Should I accept my suicidal OCD thoughts or just acknowledge their presence?

You accept all of it. Accept the uncertainty of life, accept you might or might not have these thoughts for the rest of you life, accept you might or might not be suicidal, and so on. Your theme will change throughout life but the theme isn’t the main focal point—it’s dealing with OCD as a whole. And you deal with it by not caring enough to start the OCD cycle.

People who don't have OCD may not understand the situation you're going through right now.Therefore, it is possible for them to interpret your intrusive thoughts differently.It is very important who told you to accept these. If someone who specializes in OCD has told you this, it means they want you to accept that these thoughts exist. People with OCD try to avoid intrusive thoughts, because these thoughts make them extremely nervous. Trying to escape these thoughts are also a compulsion. Individuals with OCD feel guilty for having these thoughts and think that they are a very bad person. But every person, with or without OCD, has had these thoughts at least once. So accepting these thoughts means accepting the existence of these thoughts, not the possibility of them being real. Acknowledging the existence of these thoughts will make it easier for you to ignore them, thereby reducing the need to perform compulsions to avoid them. So whenever you feel like these thoughts are disturbing you, you should be able to tell yourself that "yes there is this thought in my mind so what? Maybe i will or maybe i will not. I don't know. But i don't want to figure it out now." It may be hard at first but be prepared to say this like million times if it is necessary. It will teach your brain to accept these thoughts as just thoughts without overinterpreting them.

It is about noticing the thought and doing nothing about it. For example, you have a thought about jumping in front of a train, you notice it, you acknowledge it, but you don't do anything about it. It is also about coming to terms with the worst scenario.

i think accept that you have these thoughts? recognizing that might help reassure you that you don’t actually want to commit and it’s just a reoccurring compulsive thought

Basically, because having these thoughts do not make them real. Just because you have suicidal thoughts doesn't mean you'll act on them. Thinking about these thoughts and seeking reassurance will only increase your anxiety and strengten your OCD. The goal here is to stop fighting uncertainty and thus learn to tolerate anxiety. It may be harder to do it alone at the beginning so you may consider getting professional help.

If you wanted to do it then you would know that you wanted to do it. This is OCD playing tricks with your mind. What actually bothers you right now as i understand is the uncertainty of it. You think like OK i dont want to do it now, but what if i want to do it one day. So by telling yourself maybe i do, you acknowledge the possibility of your thoughts. And by telling yourself maybe i dont you create an uncertainty for your OCD. You are simply acknowledging the possibility of you may not do it. By saying i don't know, you admit yourself that you're not sure about whether you will or won't commit suicide. And just let the anxiety set in without trying to fix it. And last step is about response prevention. Simply by saying i'm not going to try to figure it out now. Allow the questions in your mind to stay unanswered and for the next couple minutes try to refrain any efforts to determine whether you will do it or not. At least this is what i do to stop ruminating about my own intrusive thoughts.

You don't have to invite this uncertainty out of nowhere but when it comes, don't fight with your thoughts feel the anxiety but don't do anything to make it disappear. Whatever it tells you simply just don't listen or don't take it seriously. Ignore it like you'd to an annoying person. After you feel your anxiety fading away you may do something like a hobby or going for a walk etc. to relax and to distract yourself.