Like Claire Marie last season? Or Rikke Nora this season?
The agency will announce someone as an exclusive, so unless they do that, they aren't exclusives.
Sometimes you can check the models instagram pages, like MDC doesn't credit Rikke Nora as an exclusive for LV FW 2025, but on instagram
she said she was an exclusive.
Or for Prada FW23 Sascha Rajasalu only walked Prada in MFW. She was not credited an an exclusive, but then like 2 weeks later she posted on Instagram that she was an exclusive with Prada for that season. ( Actually she was an exclusive 2 seasons in a row, but not credited on MDC )
So it is possible some agencies could still be working out deals, or maybe they fell through for some girls etc.