I just noticed that the PHP version is not shown in the Software Versions section of the Webmin System Information page after I used the automated install with – LEMP (Nginx) option. I thought maybe it wasn’t installed. But it looks like it is installed on the server. So probably should be there right? The Virtualmin with Apache did show the PHP version.
stefan1959 is correct. There is not a single PHP version, every domain might be using a different one. There is the OS default version (which I think most folks should try to stick with when possible), but I think most folks tend to have a couple versions to deal with cranky older or newer software.
I mainly use 7.4 and 8.2 as of now in both Alma/rocky and debian and it works great. Both are on LEMP stack. However it not show as a separate service like you see in LAMP install.