The character Rachel Garrett, played by Kacey Rohl, first appeared in the season three TNG episode Yesterday's Enterprise (1990) as Captain of the USS Enterprise-C.
Georgiou's assistant Virgil in the first bar scene is from the planet Cheron, which is from the TOS episode Let That Be Your Last Battlefield (1969). It can be inferred that he was from that planet's ruling class in that he is black on the right side which is the same as Frank Gorshin's character Commissioner Bele.
This film was originally planned as a television series, but after Michelle Yeoh won an Academy Award for Best Actress, this was redeveloped into a television movie.
"Star Trek" doesn't appear on screen as part of the title, only in the opening bumper and in Gene Roddenberry's "created by" credit.
Virgil is the first appearance of an inhabitant of the planet Cheron since the TOS episode Let That Be Your Last Battlefield (1969). Quasi is the first Chameloid to be seen since Martia from Star Trek VI: La conquête du nouveau monde (1991).