I have the same issue in a school, a classroom suite of High Sierra Mac's that support Photoshop 21.2.12.
This is 2 generations older than the current version of 23.3.1
All I want to be able to do is use the Admin Console to download 2020 apps to keep the suite running until replacement. The latest version in education is not needed (and the hardware simply is not funded)
Replacement computers are ordered but > 6month delivery delays.
I can download 21.2.12 as a custom package in Adobe Console, but cannot download After Effects 17.6 (plus Premiere Pro + other apps)
I can still create packages for CS6, CC 2015, 2016, 2017 & 2018, but the only versions I cannot fully download is 2019 and 2020 from adobe. There is a 'gap' downloading Adobe software which is disappointing for students learning Adobe software. We dont require any support, and pay yearly licencing.
Adobe poorly supports or understands education customers.