Madden AMP hopefully will get updated to support Madden 20. It was updated last year to support Madden 19 since it was the first PC version since 2008 which is the last version that AMP supported. I'm not sure how long it will take to get an update though as the original programmer said last year he wasn't going to update AMP anymore after his last release for Madden 19 early this year.
Another person took his source code though since it is open source and did a couple more updates earlier this year. Not sure if that person will continue to update it for Madden 20 or not. Keep an eye out over here on these forums for it.
http://www.footballidiot.com/forum/viewforum.php?f=115