My friend has 2 separate tickets
First flight is on TAP portugal from LIS to BCN with 2 1/2 hour layover at BCN before taking AA from BCN to MIA. She has a check in luggage from LIS. Can it be tagged all the way to MIA.?

If not she can take just a carry on luggage. Will she be able to obtain a boarding pass from AA at the transfer desk for connecting flight? Am assuming AA will be at transfer desk.

Thanks