PGTA testing after freezing?

Hoping someone can tell me their personal experience. 2 years ago we did our first transfer which led to my our first boy. At the time of treatment I was 26 years old and we decided to opt out the pgta testing. We then became pregnant again naturally a year ago with my second son. We have 2 embryos left (5AB & 5AC) my husband and I would love to know the sexes of the babies before making any decisions on transferring or donating.

Has anyone gone through the testing with success after being frozen and then thawing again for transfer?