Use the BT Wholesale Availability Checker.
https://www.broadbandchecker.btwholesale.com/#/ADSL/...
Enter your postcode and select your address from the drop down list that appears.
Look under the section WBC FTTC Availability. If it shows waiting list then it means your fibre cabinet is full and would explain why fibre is showing unavailable to you.
You may not be able to switch provider until it shows as available instead of waiting list.
Edited by j0hn83 (Mon 05-Dec-22 14:47:17)