What are you feeding them?

If you are going to over-crowd them both into such a small pot why not at least fill it with soil? There is room for much more potting mix in there and it is needed.

The most common cause of big healthy plants with few blooms is excess nitrogen fertilizer so what have you fed and how often?

Plus most importantly where are you located - garden zone - weather makes a big difference in pepper production as they want it hot.

Dave

Should I put pepper plant into 2 separate pots Or just put in more soil Feed with MG weekly I live in zone 9. Very hot here

I would not try to separate them at this point. They look pretty large, no doubt the roots are very intermingled at this point. Plus, you've got a big enough pot, IMO. I would snip off the leaves from the dirt up to the level of the pot, then fill in with more dirt. That will give them extra growing room.

Agree it is too late to separate them now. But your pot definitely needs to be filled. Normal fill is up to 1" below the top rim. In the photo it looks as if all of them need filling.

Dave