Hi @JeanPierreTryhard welcome to the /e/ forum.
To answer this question you need to think of device codename.
From Smartphone Selector I find
Device codenames a52q and a52sxq, so each Rom will fit this device only.
From a Google source I find
Branding,Marketing,Device,Model
Samsung,Galaxy A52,a52q,SM-A525F
Samsung,Galaxy A52,a52q,SM-A525M
Samsung,Galaxy A52 5G,a52xq,SM-A5260
Samsung,Galaxy A52 5G,a52xq,SM-A526B
Samsung,Galaxy A52 5G,a52xq,SM-A526N
Samsung,Galaxy A52 5G,a52xq,SM-A526U
Samsung,Galaxy A52 5G,a52xq,SM-A526U1
Samsung,Galaxy A52 5G,a52xq,SM-A526W
Samsung,Galaxy A52s 5G,a52sxq,SM-A528B
Samsung,Galaxy A52s 5G,a52sxq,SM-A528N
As you deduce Samsung,Galaxy A52 5G,a52xq,SM-A526B, is not a fit for either ROM.
Just a guess … but as a52xq also serves SM-A526U + A526U1 you could do some research your end to see if your device actually has a locked bootloader.