Can aqua regia/royal water dissolve lead?
Aqua regia doesn't actually dissolve lead metal. It converts to insoluble lead salt. From here:

When we are working with an acidic chloride solution, like HCl (with
an oxidizer) or aqua regia, most of the lead will become an insoluble
lead chloride which if it is left to settle can be removed by careful
decanting of the solution and filtering, what lead does carry through
the process with this solution can then be removed with a few drops of
sulfuric acid, and precipitated out of solution as a lead sulfate.

Here is a YouTube video for your reference.