Rizin[1][2] has the byte-level highlight (enter visual mode with `V` key then rotate through modes using `p` or `P`)[3], and there is an issue[4] for Cutter to add binary visualization as a plugin, if anyone is up to the task.

[1] https://rizin.re

[2] https://github.com/rizinorg/rizin

[3] https://book.rizin.re/src/visual_mode/intro.html

[4] https://github.com/rizinorg/cutter-plugins/issues/3