According to the detailed issues of Chrome/Chromium's discontinuation of Flash support, translated by the front-end time , the new version of Chrome will not directly support Flash after 2021, and the old version of Chrome will also treat Flash plugins as expired plugins. At that time, even if you are using an older version of Chrome, a "Adobe Flash Player has been blocked due to expiration" will appear, and you need to click Run once next to it each time.
If there are still businesses that need to rely on Flash, you should turn off the automatic update of Chrome in advance, and then add startup parameters to the old version of the Chrome main program to manually enable expired plug-ins. The startup parameters are as follows:
chrome.exe --allow-outdated-plugins