Hi,
Sorry for the delayed reply.
Microsoft only offers an App locker service for Enterprise and Education versions. However, you can check other third party software that does the same thing in this link:
https://beebom.com/how-lock-apps-windows-10/
(Standard Disclaimer: This is a non-Microsoft website. The page appears to be providing accurate, safe information. Watch out for ads on the site that may advertise products frequently classified as a PUP (Potentially Unwanted Products). Thoroughly research any product advertised on the site before you decide to download and install it.)