«it will no longer provide support for Flash Player after December 31, 2020, and it will block Flash content from running in Flash Player beginning on January 12, 2021»

https://9to5mac.com/2021/01/12/adobe-flash-support-ends/#more-688425

Adobe ‘strongly recommends’ removing Flash now, here’s how:
https://9to5mac.com/2021/01/12/fully-remove-adobe-flash-from-mac/