Basically, the mobile connection determines the speed.
My Mac says 240Mbps
Speedtest.ch (Down: 80Mbps, Up: 40Mbps, Ping: 37ms)
That's enough for everything you need (VDI/AVD with Teams video session and downloads of all kinds.
But I also have a 100% 5G connection.
Not really for gaming with the ping.
The battery easily lasts a working day with 2 connected devices.