Warts (internal) and strains

I’ve found through the Superdrug test that I have hpv 6, 54, 56, 58. Low and high risk strains.

I had warts around my entire genital area - very widespread. I paid for them to be removed by cauterisation. However I don’t know if I have any internal warts internally inside my vagina or anus. Has anyone had this concern and how did you get it checked and treated?

My second question is whether anyone knows what high risk strains the NHS test for? Is it only 16/18?