Yeah, I’m not wishing for two pointers either. The current setup with Remote Mouse software allows two devices to move the single pointer at the same time but since kdeconnect software allows sharing of files and notifications from phone onto the PC, I’m not sure how connecting two devices will work. Guess I’ll figure it out as I set it up.
I’ve set up tailscale in the past week and fallen in love with the ease of use. So, this has my vote too. But, if i was doing this, i would chop the file into, say, 500mb parts using 7z or WinZip and then transfer it through SCP (WinSCP if using windows) over tailscale IPs.