Riru VS NoStorageRestrict

https://github.com/RikkaApps/Riru it is the precursor to zygisk. It should still work since the developer is still releasing modules that support it

That's not the best solution, but try Riru version of LSPosed. It requires an additional module (https://github.com/RikkaApps/Riru/releases), but if that would work for you, it's better than nothing.

Install Riru-Core: https://github.com/RikkaApps/Riru/releases.

Riru

(Get the Riru version if you are gonna use magisk v23, but you must install riru's main module before that: https://github.com/RikkaApps/Riru/releases ) (Get the Zygisk version if you are gonna use magisk v24)

Riru: https://github.com/RikkaApps/Riru/releases/tag/v26.1.3LSPosed : https://github.com/LSPosed/LSPosed/releases/tag/v1.6.0

Download the latest version of the Magisk module with an interesting name Riru and install it via Magisk

Xposed wont be updated after Android 7.0. So I use edxposed instead;Edxposed depends on Riru-core so install Riru-core first: https://github.com/RikkaApps/Riru/releases after downlad copy it into the phone install it by Magisk then restart(重启) download EdXposed https://github.com/ElderDrivers/EdXposed/releases/ Install EdXposedin the same way as installing Riru-core

FX accessed most things, but some folders were still showing access denied and I couldn't write to SD card. After I downloaded https://github.com/Magisk-Modules-Alt-Repo/NoStorageRestrict it worked perfectly.

NoStorageRestrict: https://github.com/Magisk-Modules-Alt-Repo/NoStorageRestrict: Removes the restriction when selecting folders (Downloads/Android) through the file manager on Android 11 and higher (available through Fox's MMM app too).

Okay. I have 2 modules that I'd try if I were you, and hopefully one does the charm. Now they're both pretty generic modules. Just meaning that they have pretty universal compatibility. So I'd be highly surprised if either of them caused any unwanted side effects like bootlooping or the likes of. In any case I wouldn't expect you to trust a random module that a stranger sent a link to, because I wouldn't trust it either. So for both I linked the module developers GitHub pages with their source codes. That way you can read about them yourself and see if you want to flash either of them. The first one that came to mind when I read your post was this one : https://github.com/ph4n70m-404/DocumentsUI-Replacer. Basically, when you flash this is gives you a choice between two file managers, and whichever you choose it will replace your systems default file manager with. And I'm hoping that it will fix your issue The second one is here : https://github.com/Magisk-Modules-Alt-Repo/NoStorageRestrict This one I'm not so sure about. It's pretty self explanatory once you go to the GitHub page. If the first one doesn't work then I'd give this one a shot. Just let me know if either works for you