It’s not true that there are no standards. Rather a few companies have proprietary standards, but most of them if they say “tubeless ready” are using the Mavic UST bead.

In addition to the bead and sealant and tape there are a few more features that make a true tubeless tire. The companies all have their own trademark for these but essentially they are tougher sidewalls and a thin layer of soft rubber inside to help the sealant do its job.