I guess, you should just try running KRE on your M1 mac. It should run.
Why I guess so? See the following post by @duyluong of Katalon
I guess that Katalon Runtime Engine is built as a x86-64-based application software. On mac with Apple silicon chip, KRE run on top of a emulation layer named Rosseta 2. The Rosseta 2 provides an X86-inteface to the application. The x86-64 to Arm64 instruction translation makes the application run slow.
So KRE should run on Apple M1. However you should note that it could be slower than Katalon Studio for Arm64. Here is a performance comparison report: Katalon is slow to execute tests cases on MAC - #31 by kazurayam