Anyone using StoreFront 2507 CU1 with 2203 CU4 DDC’s with success?

I had no issues with older versions all the way back to 6.5.

Thanks for confirming 👍

StoreFront 2507 with DDC 2203 is supported, see: https://docs.citrix.com/en-us/storefront/2507-ltsr/get-started/system-requirements.html#citrix-virtual-apps-and-desktops.