"TUF" would be ASUS potentially a prebuild (although there are TUF cases).... depending on the age/tier of the components ,you can make a bit of an educated guess.
If it's something like this, which is an FX10CP (8th Gen Intel etc)
You're likely looking at a 300-400W AcBel unit, almost certainly 80+ Bronze (or similar spec, OEMs will likely vary suppliers depending on supply costs).
Of course, if it's not a prebuilt - then it's anybodies guess.
If you remove the other side panel, you should be able to see the PSU though - they have to be able to get it into the case somehow.