SharePoint Designer 2013 is deprecated

I am not sure that this topic has been discussed before.

https://learn.microsoft.com/en-us/sharepoint/what-s-new/what-s-deprecated-or-removed-from-sharepoint-server-subscription-edition

According to this page the, July 14, 2026 after that date, SharePoint Designer 2013 will no longer be supported. But it looks like we still can create a publish workflows?

Does any body have suggestion for 3. Parties’ solution for that. Did checked Nintex K2 and its very expensive. We just have 10 workflows send email with content in body. And one approval workflow. 

Any solution i can create with SPFX or in SP to have this opportunity to create WF. I know about VS but there are not that simple.