I have the same issue,
I just talked to ESET support and they told me they have not develop a compatible version for MAC with M1 processor (ARM-based system on a chip).
During this the ESET agent sent me a URL saying to tried downloading and installing an agent that was for a x86 architecture. Off course didn’t worked my MAC wouldn’t even open the file. When I told him about this, he later replied saying that ESET has not developed a compatible version for that type of processors.
Is there a date for the release of a compatible version?