As for if any of Michael K. Williams’ cut scenes will be made available on the Han Solo movie’s home release, that’s hard to say.
Either way, hopefully we’ll learn more about Williams’ character once the Han Solo movie has screened to the public, either from Williams himself or someone else from the cast/crew.
Depending on how important his character was to the story, it’s possible Lucasfilm might throw in a few of Williams’ moments to give Star Wars fans a taste of what might have been.
But let’s also not forget that Rogue One: A Star Wars Story cut a fair chunk of material from before its reshoots, including scenes that were shown in the first trailer, and those weren’t included on the home release.