How do you sandbox on mobile? I can't say I love having various apps like wechat on my phone...
Every app is sandboxed by default.
Secure Folders on Samsung. Multiple user profiles on Pixels/AOSP.
Separate grapheneos accounts for everything does that I believe
I quite like Shelter [1]. Shelter apps are installed in a separate work profile, which essentially sandboxes it from the rest of your data. It also has a neat feature to automatically disable (freeze) specific apps and seamlessly re-enable them when you launch them through Shelter.
[1] https://github.com/achalmgucker/Shelter