from the link you posted:
- set CONFIG_PREEMPT_VOLUNTARY as new default - PREEMPT_DYNAMIC is now available
and desired behavior can be choosen using kernel append line
as there is no issue mentioned, I guess that’s all the information that is available.
6.5 won’t be the new LTS. 6.6 could theoretically become a LTS kernel, but so could 6.7.
For that and for the remaining question: