Boot Camp Windows 10 partition size on macOS Catalina

I'm trying to install Windows 10 on my MBP 13 mid-2012 using Boot Camp Assistant. I've been clearing up free space on my HD and when I thought I have enough I'm (500GB drive with currently ~200GB free space) I can't seem to get more than 100GB of dedicated space for a Windows partition. To make things even more weird, every time I re-run the Boot Camp Assistant I'm getting less and less space. Is that space being reserved by Boot Camp Assistant and not getting released after? Does anyone know how I can release it myself?

I also ran diskutil apfs resizeContainer disk0s2 limits to check the limits and by my calculation I should have at least 128GB available for installing Windows (499.9 - 361.3 (recommended min) - 10 (win installation reservation)):

And here are the shots of how the disk looks like from Disk Utility:

Thank you all for your help