It’s essentially just overriding some of the theme components. You should have the Difficulty option still with the separator option checked, and a blank separator underneath.
Then go to the Theme panel, and to this bit
Change the top two labeled_separator options to New StyleBoxEmpty which should remove the lines on the Difficulty option. Then change the bottom Separator option to New StyleBoxLine This should also bring it up in the Inspector so you can change the colour and thickness of it.
Sorry if I haven’t responded in a while. Setting it to a style box empty removed the separator lines in-between the text (Now I know where those lines came from). But setting the separator to a stylebox line (despite changing the one in the preview) didn’t show any line in the actual option button.
It’s been a long while since I really said anything here or asked for anymore help. After getting some help on discord though, Thanks to @octopuddle and @gertkeno for helping me out with the issue here!
But unfortunately, I was NOT able to find an actual solution to this problem, and I’ll prob start making the ui on my own instead of using the option button. I’ll set this as the solution since getting any more responses will be unnecessary now.
Link to the message where I explain everything: Discord