Posted: Tue Nov 30, 2021 6:52pm
You could, and should, have registered with DGT before Dec 31st.
Since you missed that deadline then your entitlement to drive on a UK licence expired 6 months after you achieved residency but in any case on Oct 31st.
To continue driving you must now pass a Spanish test.
Exchanging licences is not a matter of law but of bilateral agreement, currently no such agreement exists nor does there appear to be any realistic prospect of one being reached in the near to medium term future.
The above means that you should not be driving in Spain. The consequences of driving without a valid licence can be severe, doubly so if you had an accident where potentially your insurance could be declared void.
The advice to wait is seriously remiss!