A Japanese 3D animator on Twitter, whose username is
@nebaru6, creates various transformation sequence animations based on actual transformation sequence from various anime, including some AP TF as well.
https://twitter.com/nebaru6
Some examples of their AP TF sequences:
https://twitter.com/i/status/1508475796775596036
(Rika Nanoka and Renamon's fusion digivolution into Sakuyamon from Digimon Tamers)
https://twitter.com/i/status/1380507046487805958
(UFO Princess Valkyrie)
https://twitter.com/i/status/1386640644425142272
(UFO Princess Valkyrie Arranged ver.)
https://twitter.com/i/status/1512387565269438464
(UFO Princess Valkyrie Arranged version of the BE part)
https://twitter.com/i/status/1431236790464045063
(Cyberteam in Akihabara)
They seem to be quite underrated at the moment, so give them a follow on Twitter if you like their works.