mobian phosh on screen keyboard not popping up for Chromium/Electron apps

[grump_fiddle_reinstall]

I use Vivaldi browser (stable and snapshot) on my PinePhone and FreeTube to watch YouTube videos. I also have Chromium installed on my PinePhone. Vivaldi is based on Chromium and FreeTube is an electron app.

When I place the cursor in the URL field of Vivaldi or Chromium or in the search field in FreeTube, I would expect for the on screen keyboard to appear as it does with Firefox thus allowing me to enter a URL/search term into the field. 

This does not happen with the Chromium/Elecron apps. Is there a way round this ideally so that the on screen keyboard will appear automatically?

[Kevin Kofler]

Chromium/Electron needs to finally support the text_input_manager_v3 Wayland protocol for that. Recent versions have support for it hidden behind a flag, but it seems to still be broken in some ways, so they do not want to enable it by default. See https://issues.chromium.org/issues/40113488.