Has anyone registered for this, but not gotten miles credited for Lyft rides?

On Delta.com, under "SkyMiles", and then under "My Promotions", it shows "Lyft Account Linked" and the date it was linked, but under "Tracking Progress", it says:

WHOOPS! WE'RE SORRY, BUT TRACKING PROGRESS IS NOT AVAILABLE

No miles have been credited at all, even though I've had my Lyft account linked for months and have taken numerous rides.

On the Lyft app, under "Rewards", I keep linking my Delta account, but every time I do, it says that my account is already linked.

I'd appreciate any tips about how to get the Delta miles from Lyft rides, particularly since I registered to do so a long time ago.

Thanks.