We are all in the same boat when it comes to:
our cost of living rising more rapidly than at any time in the last 30 years;
queueing at airports;
having to wait for the delivery of good affected by the supply chain.
Even the mighty Apple warned (at yesterday's developers conference) that delivery of it's new M2-powered laptops will be delayed (although I'm sure they don't mind one bit (sic) that scarcity creates demand).
Once warned, we are prepared.
I filled the car on Sunday and expected it to be expensive;
I'm flying to Dubrovnik and Geneva in the next two weeks and expect to arrive earlier than usual to check in;
Anything electronic will take longer to arrive.
So I'm going to suggest that a 12-week wait for a dental appointment is no big surprise, given dental deserts and continued staff disruption due to Covid.
As in all things, customers/patients just don't like surprises.
The only reason that a patient will get angry at being told they must wait is if they didn't already know it was going to happen.
The sooner you get a newsletter out to them to explain the delay and the reasons for it - the better.
Otherwise you are throwing your FOH team into battle every day.