I think that's the only one. On the wiki page of android version history it's listed as a feature of 14, and if other version would have similar limitations it would be also listed there:
Installation of apps designed to target Android versions and SDKs older than Marshmallow (6.0) is blocked to prevent malware.
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infeeeee@lemm.ee · 1 pts · 1y
I think that's the only one. On the wiki page of android version history it's listed as a feature of 14, and if other version would have similar limitations it would be also listed there:
https://en.wikipedia.org/wiki/Android_version_history#Android_14