Employment Opportunities after University in UK (Oxford to Queens College Belfast) vs. US (Bowdoin, etc.)

She’s a US citizen and will also apply to more achievable schools. Bowdoin is just her top US pick and the only school she has decided is worth the money to her (we have great instate options with different levels of selectivity). Because of her UK focus, I am just trying to get more information on how that may impact her longterm. Thank you!