That’s gboard and also thumbkey on Android. The stock keyboard (e.g. on lineage) does nothing.

Holding the spacebar switches languages, despite the fact that there is annoyingly a language button right next to the spacebar.

Stock android keyboard is genuinely terrible.

The best stock layout I’ve seen is on PmOS which puts dot to the left of Q, and comma to the right of L, thus saving that extra diagonal space.