This situation with King Charles coins not being as abundant in circulation pales in comparison with when the new $10 bills with Viola Desmond were first issued in 2018. Atlantic Canada (especially Newfoundland) had a very small number to start, and banks in Newfoundland (and likely Atlantic Canada) had a large number of outstanding MacDonald $10s to distribute. Because of scarcity of Desmonds, people likely held on to them and would likely only spend the MacDonald $10s. Five years later, in 2023, the number of Desmond $10s now overshadow the MacDonald variety in my province. I do not remember the last time I received a MacDonald $10 in my change or from an ATM - they're quite scarce now.
The King Charles coins are likely in the same predicament. They are very scarce - I never see any in my change, and could imply that people who receive them from the bank refuse to spend them until they become more abundant.
If this trend with the Desmond $10s holds true for the King Charles coins, I expect it will be 2028 or 2029 by the time they become widely circulated nationwide, including Atlantic Canada.
Also, are there any King Charles coins minted for 2024 (not including commemorative) yet?