Certainly seems no new Note model in 2021 which would suggest N and S series may be merged and Samsung will focus on premium devices including the Fold for the ultimate experience. Can understand it from business and efficiency point of view, though maybe a pity of a pity (though am not Note user myself)
Can see a bit about the History here, heading may be a bit overdramatic. https://www.androidcentral.com/samsung-galaxy-note-eulogy?
Still a bit speculative and whilst the Note series might have a limited lifeline, according to these articles a Note 21 may be on the Horizon. Talk of an an under display front camera that is invisible to the naked eye.