This specific issue affected the Stripe gateway plugin created by WooCommerce. It does not affect Webtoffee’s plugin.
You may not see an update for the plugin because the latest version of Webtoffee’s plugin requires WordPress 5.6, and ClassicPress is currently based on 4.9. So the update is disabled to prevent users from breaking their websites.
We are currently working on ClassicPress v2.0, which is based on WordPress 6.2. When v2.0 is out, you can test Webtoffee’s plugin. You should be able to update then. Remember, we can’t guarantee it will work, so it’s best to test it on a staging website if possible to see if it works.