There are dozens of posts on this forum stating that you are legally entitled to live in PT from the moment you submit your ARI application.
So unless this is false, it implies that those who normally need a Schengen visa are entitled to live in Portugal but not to enter Portugal, even from a non-Schengen port of entry, unless they obtain a separate Schengen visa from AIMA under the pretense of entering for tourism purposes despite having already made a residence visa application to AIMA. This is some unfathomable madness, even for AIMA…