Harmonize point layer behavior regarding vertices extraction/filtering algorithms

[DelazJ]

While checking algs for documentation, I realized that the "Extract (specific) vertices" can be run on polygon, lines... and points features. Meaning a point is considered as a vertex within a (multi)point feature. Why not? This operates either like a multi to single parts alg for point layer or allows to remove points within a multipoint feature.
But the "filter vertices by m/z values" algs only operate on polygons and lines. Someone can want to filter points within a multipoint feature based on their m/z value. And if we consider point as vertices, should they not also be available in this context?
I don't know if the first paragraph is an intended behavior or a bug, nor if the second is a bug or a feature request.

[Pedro-Murteira]

Still valid on QGIS 3.22.3.