It's so good to hear from you @Billie2! We have missed you!
For my FET, I had both BTs and scans. On CD10 only a BT and BT and scan On CD15 (I reckon it should have been CD14 but it was a long weekend so they rang me to a day late). I think the scan was to check for ovulation and lining thickness. Then they arranged for FET 5 days after (so it was CD20 for me).
I'm so crossing my fingers and toes and sending you all the baby dust in this universe! Hope this cycle is THE one! Are you doing a double transfer? You had 2 frosties right?