Rioplatense Spanish questions

I'm new here, from Australia. I'm not currently learning Spanish yet, but I am listening to it currently (especially the Rioplatense dialect in Argentina). Argentine footballers, when playing in a European Big 5 league or Major League Soccer club (An example is Lionel Messi during his time at FC Barcelona until 2021, PSG in 2022-23 and Inter Miami from 2023-present), tend to speak standard European Spanish in interviews or other media as they adapt to a new league through language barriers (La Liga's normal language is standard European Spanish for example). Does it affect how and when their native Rioplatense accent is used?

And speaking of Messi, how did his Spanish change over time when he played in FC Barcelona and Inter Miami (his current club), and why is his native Argentine accent being used less frequently in football clubs, but might be used more frequently in his home country with the national team? Since he is a Rosario native, is the accent here slightly different from the accents of Buenos Aires and Córdoba, in terms of the cadence, musicality and the pronunciation of words?

Thanks in advance.