the datetime operators you are using don’t need the single quote (‘) before and after the value, also the time value is not the one you usually receive (but should work) so your url should look like this one:
https:/url-of-company.com/api/data/v9.2/accounts?$filter=modifiedon%20le%202022-02-22T10:51:00.000Z%20and%20modifiedon%20ge%202022-02-22T10:36:00.000Z
if you need to build and test such queries you can use Dataverse REST Builder (you can find the link inside my signature)
hope it helps
