Unavailable algorithm in QGIS

When I try to launch my model (graphical modeler) in QGIS I get this message (in french) :

Cet algorithme ne peut pas être lancé 🙁 Le modèle que vous essayez
de lancer contient un algorithme qui n’est pas disponible
:native:countpointsinpolygon

It translates roughly in the fact that the :native:countpointsinpolygon algorithm can’t be used because it’s not available.

I guess it is because I changed QGIS version (currently 3.10.13).

How can I convert it/export ? It was quite a big model, and I this feature (counting points in polygons) didn’t disappear from QGIS.