This is a development version that was blocked, the main extension was not block...

_Microft · on Oct 12, 2019

They expect to be no longer able to update it.

"Since the next uBO release will essentially be what 1.22.5rc2 is, consider that uBO is probably coming to an end of life in the Chrome Web Store -- there is no good reason to believe uBO 1.22.5rc2 would no longer be rejected with only changing the version number to 1.23.0.", https://github.com/uBlockOrigin/uBlock-issues/issues/745#iss...