When our eldest outgrew the weeride (@4 ish) she was reluctant to use the tyke totter we bought to replace it. I ended up removing the stirrups from the weeride and using the footpegs from the tyre totter.
Only got 6 more months out if it, moved on to the tyke totter properly but by then she’d almost outgrown that too.
In my opinion, 4.5 to 5 is too old/big for a bike seat and you’re into copilot territory. That or walking. For the last 8ish months I’ve been pushing the bike with eldest standing on the nds pedal, works well but it’s a short walk home for us…