Question about syncing "Web apps (PWAs)"

In Sync Settings, one of the sync data options is for “Web apps (PWAs)”, but I am not clear on what data is being synced when I enable this option. PWAs that I have “installed” do not automatically get installed on other devices on my sync chain, and if I manually install the same PWA on two separate devices on the same chain, the session does not seem to be shared between the devices either. Please help me understand what enabling this option does. Thanks!!

(using Brave on two different Macbooks)

bumping this, anyone able to offer any help on what syncing “Web apps (PWAs)” does?