I talked about boys already, then talk about Olu more and she says he likes me (thought you were cute, then the you don't mind option, then the you have an open relationship?). I haven't gotten anything after that. Besides going to Olu and he kisses you, but I don't get any sex options.
if you did all that and you are getting that scene and not getting the kiss option somehow it got bugged. I looked at the code and if you talked about boys with Luda and then as I said hit the follow up acts after that, it sets the code to allow you to kiss Olu back. So I have no clue how it could have done that as it should not be possible. But the code seems correct
Perhaps retry talking to Luda about boys and the follow up acts I listed above in that order and then talk to Olu again and see if it unlocks it. It should because it should set the trigger if it wasn't set. If that doesn't work then there is something broken in your save at a guess and I am a writer and not a coder and we will have reached the end of my ability to help.
In which case I would say join our discord and ask the question in the discord questions channel and have a coder check things, they can have you enter input commands and check how it might be bugged. I personally don't know how to do that stuff and our coders are mostly only active on discord.