The relevant change is SHA1 in openssl3
https://github.com/openssl/openssl/commit/aba03ae571ea677fc484daef00a21ca8f7e82708
SHA1 is, contrary to what someone would expect given that the documentation 
says:

Level 4

Security level set to 192 bits of security. As a result RSA, DSA and
DH keys shorter than 7680 bits and ECC keys shorter than 384 bits are
prohibited.  Cipher suites using SHA1 for the MAC are prohibited. TLS
versions below 1.2 are not permitted.

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https://bugs.launchpad.net/bugs/1954970

Title:
  remmina "Cannot connect to the RDP server ... via TLS. Check that the
  client and server support a common TLS version"

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