Frankly my initial reaction is you have a nice kit for a handlebar bag and I wouldn’t do anything. My bike kit is a GM1 + P12-32 and PL15 for indoors. I have a Ulanzi carbon graphite mini tripod with a decent ball head I grab when I think I’ll need it. I lack reach, not a pressing issue in my urban setting. I sold my P45-150 for a song. A lens you might consider if that's sufficient extra reach. It a surprisingly decent lens.
I have the reasonably compact GX9 and the P14-140. Too heavy, too big, unwieldily in my reasonably large Arkel bag. I’d feel the same about most of the suggested zooms.
You might consider if a tripod makes sense. Provides stabilization for indoors. Carry it in a tube if you have spare bottle lugs. The only other way you’re going to get it on a wide zoom is IBIS and that’s a larger body.
I have the reasonably compact GX9 and the P14-140. Too heavy, too big, unwieldily in my reasonably large Arkel bag. I’d feel the same about most of the suggested zooms.
You might consider if a tripod makes sense. Provides stabilization for indoors. Carry it in a tube if you have spare bottle lugs. The only other way you’re going to get it on a wide zoom is IBIS and that’s a larger body.