New Beekeeper with first year hives. One hive looks queenless. Try to save or let it go?

I have noticed one of my hives had a huge activity drop. I was assuming a possible swarm or absconding because I accidentally aggravated the queen quite a bit during an inspection (dropped her outside the hive in the sun for about 10 minutes before I noticed).

I gave them a couple weeks and have just gone in to check. Sure enough, I see a lot of honey, spotty drone brood, and that's it.

My other hive looks pretty healthy. I know I can try to move a frame or two of brood over to the weak hive from the strong hive. However, I'm still very much an amatuer and seem to create more problems than I solve half the time.

Should I leave my one hive that is doing well alone? Or should I try to save the second hive by moving a couple of brood frames over (or other suggestion).

Thank you!