Do you need a Channel NICHE?

My Gaming Channel got monetised late last year and for a while I've never really had a NICHE.

I mostly did Vertical Livestreams which gave me watch hours and subscribers but I want to have consistent growth now that I've stopped streaming Vertical.

My recent videos are just random and I'm not sure what to do about having a niche and how to go about it.

Any Advice or Tips would be appreciated.