Ideally, sent tabs should open automatically on the other device - as they already do when you send them from Android to Desktop. Having to tap on each notification is really cumbersome.
Better shortcut customization would improve the browsing experience on Android greatly and I don't imagine it would be that difficult to implement compared to other features...
Please support this! It's a really useful feature. Not only for privacy, but also for logging in with different accounts on the same website, e.g., logging in with two separate Reddit accounts in the same browser.