Need some advise here.

Condo 1300 sqft
Time 100mbps with stock DLink DIR-805L router
Bad WiFi signal coverage in all 3 rooms, router located in living room (relative near to bedroom but with wall partition and seat beside my "floor speaker", I know it is not ideal with the big speaker beside the router.

Planning to improve WiFi signal.

Looking into Huawei AX3 or TP-Link AX20.

Will above router helps? Or should I use Mesh WiFi?
If not mistaken both model above do support Mesh WiFi.

Have a cable connected MiRouter 3 in room3 for WFH, but it only good in the room, it wouldn't roaming properly when I walk out to living hall.

Kids need better wifi for online class.... please advise...