Don't know. Thanet and Ramsgate have both been updated to taking orders but I can't yet. It looks like only a few cabs are enabled on the Thanet exchange, so even when the exchange is enabled could still be a long wait.
I have only checked a couple of postcodes on the Ramsgate exchange and can't order on them.
I would think Broadstairs would be enabled soon and then Openreach will probably sod off and leave the rest of us to wait ages, or if ever, to be enabled.
You need to check postcode and address, and preferably an address next to the cabinet, and 100% of lines in that postcode should be supplied by the cabinet you want to check, otherwise you may check an address for a different cabinet.
Check 14 Ramsgate ones this afternoon, these are accepting orders:
and these are the others I've checked, which aren't yet.
I've updated the map accordingly.
Looks like they enable just five cabs first of all, as thats what was done in Margate, haven't checked to see if anymore in Margate are live yet. Checked a few in Broadstairs but nothing yet.