Possibly depends on how big a firm it is and what kinds of customers it has - the bigger the firm, and the more sensitive the customers (big banks, government, military), the greater the odds of at least a pre-hire criminal record check

Also standard for any job working with vulnerable people (originally just minors, increasingly the elderly and disabled as well)-sometimes those checks are only for specified types of crimes, but the “types of crimes” included are broader than you think-e.g. assault is included (even if non-sexual and against another adult)