On the Android, there's Termux which offers a clipboard interface -- termux-clipboard-get and termux-clipboard-set which I've aliased as "xp" and "xc" respectively. (I have similar aliases for Linux and MacOS's respective clipboard manipulators.)
You can paste (including to remote SSH sessions) with the ctrl-alt-v keystroke.
It's possibly to select and copy screen regions, but tediously, so that piping to / from xc / xp is far more convenient. (I sometimes use this for composing / editing HN comments, more frequently on other sites.)
For cross-device control, there's ... Synergy, I think:
https://symless.com/synergy
There's an Android client (I've no experience with it): https://sourceforge.net/projects/synergyandroid/
On the Android, there's Termux which offers a clipboard interface -- termux-clipboard-get and termux-clipboard-set which I've aliased as "xp" and "xc" respectively. (I have similar aliases for Linux and MacOS's respective clipboard manipulators.)
You can paste (including to remote SSH sessions) with the ctrl-alt-v keystroke.
It's possibly to select and copy screen regions, but tediously, so that piping to / from xc / xp is far more convenient. (I sometimes use this for composing / editing HN comments, more frequently on other sites.)