Not sure this is a tubeless ready rim. You may need a tubeless conversion kit, not just tape and a valve.
They are not tubeless ready, but I am using tubeless tape from Superstar and and their valves. Have tried gorilla tape too with the same results. Other than a rim strip not sure what else I can try.
60psi seems far too high to get seated.
I got to 60 after disconnecting my ghetto inflator, pressures then falls to 20ish. i then pump manually to 60. when i’ve done this before normally the seating happens around 40psi.