[Solved] Can I dirty-install "MicroG for LineageOS" ROM over regular LineageOS?

I have a Redmi Note 9 (merlinx) and currently have LineageOS 20 (which is the last official ROM). It's generally fine but I have some problems with a couple apps, so I need MicroG to fix this. I don't want to go bunch of hoops to install it on my current system if possible. Would dirty-installing the same ROM with MicroG pre-installed applicable? Or do I need a clean install if I want to go that way?

Edit: It seems it's not so feasible. I guess I'll just do clean install.

Edit 2: I did dirty install and everything works fine.