If I'm not mistaken, each of the following packages - fails to build on arm64 - has an easy fix described in a bug report - has not been updated in more than a year - is blocking more than one other package
4 pgplot5 #784743 3 cernlib #766482 2 gtkimageview #765221 2 kmflcomp #765228 2 librep #770367 2 ots #727254 Does any DD want to do something about them?