I did the masquerade when I realized Default Block wasn’t letting me customize. I wanted to achieve a customized Statistics block. (Removing the stats about number of users, media, etc and popular name). And have a populated HTML block that tells them what to do when facing this unknown “My Page”.
I know of discussion to abolish/change My Page but needed to do two accounts immediately.
[updated: 30 Nov 2021]
MacOS: 10.15.7 (Catalina)
Safari 14.1.2; Firefox 94.0.2
PHP 7.4.5 FastCGI; mySQL 5.x