Unless you are travelling on a flight that is both marketed by and operated by a OW carrier , there are no OW benefits

Regardless, there is no additional luggage allowance benefit for OW status , so ( assuming this is a separate booking ), if you have >23kg of luggage , expect to pay additional fees

You might get away with a bit over, but wouldn't expect to get away with the 46kg that AA allows

if you want to avoid luggage issues, then book the whole trip as a single itinerary and you will be entitled to 2PC for the whole trip.

Vueling charges EUR10 per Kg over 23Kg

Dave