I haven’t used rideshare at Disney since September and many of the entrances are or will be undergoing renovation so maybe someone else can give a better idea but here goes:
At MK the drop off is actually at the TTC and then you’d monorail/ ferry over OR you can take rideshare to the Contemporary and walk over. Minnie Van is the only one that drops off directly at MK.
AK: along the walkway toward the entrance of the park, it’s very close to the entrance. Roughly in the circled area on the map.
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HS: currently I believe it’s row 39
Of the television lot
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Epcot: I remember it was in the corner of the Journey parking lot.