ASP.net with windows workflow foundation hasn't existed for like 10 years or something like that.
Things like this create a niche and will live longer than cockroaches after a nuclear war.
Try and find a job for asp.net webforms and windows workflow foundation.
So kinda pointless you posting that really. One is still 'current', but the other you'll be writing asp.net core with modern MVC.
https://www.indeed.com/q-What-Is-Windows-Workflow-Foundation...
And many more for webforms
https://www.indeed.com/q-Webforms-jobs.html
Niche things live on... as my post states.