An incoming SWIFT transaction goes through the 'MULC' system (Mercado Unico y Libre de Cambios) and the receiver must justify the income by indicating the activity (rent, professional services, etc.) and attaching an invoice. All this is done through the home banking app (example: https://www.santander.com.ar/personas/cobros-del-exterior#0_Paso-1)Not sure but there are posts on X of expats wiring to their own USD accounts and complaining it's not showing up. Not sure why.
Maybe that's why they don't see the money, but sending a bunch of money from personal account abroad to personal account in Argentina without justification is not a good idea at the moment.