Hi! Reviewing this because I got asked. I will note that it appears this document has already been through IETF LC, SECDIR, and GENART among others.

These two are pretty minor (and look like a secret secdir review):

1. I-D.ietf-dots-rfc8782-bis refers to DTLS 1.3 [I-D.ietf-tls-dtls13}. Should this I-D also refer to DTLS 1.3 [I-D.ietf-tls-dtls13} in s1? Pretty sure changing the reference isn't going to slow down publication because this I-D normatively references I-D.ietf-dots-rfc8782-bis. 

2. Assuming that the answer is yes and you could use (D)TLS1.3 with this protocol, I think you need to say something about or refer to the early data concerns (see s7.2 of I-D.ietf-dots-rfc8782-bis). You might consider just expand the 2nd sentence in the 1st para of s8 to also refer to s7.2 or I-D.ietf-dots-rfc8782-bis?