Lyft sent notice that beginning June 30th they’ll no longer allow earning partner rewards with both Delta and Hilton, you’ll have to choose one or the other. By default, the system will choose the one for which you first signed up.
You can either choose 3x Hilton points on most Lyft rides or 1x Delta points on most Lyft rides / 2x Delta points on airport rides. Both accounts remain linked, and you can switch back and forth at any time.
Starting June 30, 2021 you may only earn points or miles through your Lyft account with one travel partner rewards program at a time. You can change which travel partner rewards program you want to activate at any time in the Lyft App. If you do not make a selection by June 30, 2021, you will be defaulted to the travel partner you selected enrolled in first on June 30, 2021.