You can use M-. instead of $_ to insert last param of last command. You can also access older commands’ param by repeated M-. just like you would do for inserting past commands with up arrow or C-p

You could also use syncthing through termux

you can bind to a specific interface in nicotine

Jami is also an option

https://h-node.org/bluetooth/catalogue/en

You might be interested in Nyxt