Injected browser wallets not appearing on mobile devices

Bug Description

Injected browser wallets are not appearing in the connection options on mobile (see screenshot). I've noticed this issue with my project, Dawn Wallet, which injects a provider into the webpage. Previously, when a user clicked on the MetaMask icon to connect, it would prompt our connection modal.

Currently, MetaMask and other Injected/Browser wallet options do not appear. We are definitely injecting the provider, and it works on other dapps as expected.

Steps to Reproduce

1. Download the Dawn Wallet Testflight: https://testflight.apple.com/join/UHmOJnNy
2. Set up the Safari extension (onboarding in the app)
3. Go to Uniswap on Safari and try to connect

Expected Behavior

The MetaMask connection option should be available (Dawn's injected provider mimics MetaMask). When clicked, it should prompt Dawn's popup to appear.

Additional Context

Currently, on mobile, we do not see MetaMask (which we override).

Start by reproducing the connection flow on mobile Safari with the Dawn Wallet extension and compare it with desktop behavior. Trace how injected providers are detected and how MetaMask or other browser-wallet options are assembled; done means the injected wallet appears on mobile and opens the wallet popup when selected.