See if the store you use is doing Genius bar visits at this time. Some stores may be short-staffed or in areas that still have COVID restrictions in place, so you need to start by checking store status.
Find the store you wish to visit using this Apple page:
https://locate.apple.com
and select your store:
Click "View Store Details" to see what services are currently available:
However...
Have you posted your issue here? Often, your fellow users can diagnose even some hardware issues if you provide the details of your device and problems you encountered. This is especially useful for older models or those out of warranty. Many of the senior contributors here had our first Macs long before some of the store staff lost their first baby teeth!