Recommendations on Turn-Key Firewall OSes

I already have the Protectli firewall and wanted to see recommendations on firewall OSes? I have Opensense on it now but keep losing the VLAN associated to my Guest network. I pulled it out of the network and just using the Asus AX wireless router for now.

I would like to rebuild it with a set-it-and-forget-it OS that doesn't take a lot of fussing around.

Thoughts on the latest IPFire or something else? Just looking for a free, non-subscription firewall that just works.