In Brave one can press command-shift-a to get a search bar for your open tabs. Otherwise I periodically consolidate similar tabs into same windows. It would be nice to have an ontological browser for tabs but search is normally sufficient.

On a phone iOS Safari has “tab groups” that effectively act as windows in a desktop browser. It also has a tab search feature.

On my phone, I'll just open a new tab and not even bother trying to get to the other tabs. The syncing is more phone -> computer than the other way around. And, beyond that, syncing is more useful for me for between computers.