Apple products from before 2021 cannot connect to up-to-date WiFi networks.

I love the user experience with Apple, but come on... I cannot connect my iPad Pro, yes, PRO IPAD to my internet after upgrading it. I always keep it up to date because it is part of my job, but there is something outdated about my iPad. My galaxy phone works and my laptop works too on the network, so it is no coincidence that my iPad Pro and old iPhone 11 (tested) do not work. I think that they are just trying too hard to make their devices special and trap you within their ecosystem because they should not not be able to find my network.