This app was mentioned in 9 comments, with an average of 1.22 upvotes
Install a BitTorrent client, such as qBittorrent for desktop or BitTorrent for Android, and copy the magnet link into it.
Also made the switch. In my case moved from MacBook Pro to a Pixel Book. My primary use case is development. Been really happy with the switch.
Torrent does not require using Crostini but is a good way to do it. You can torrent using Android.
https://play.google.com/store/apps/details?id=com.bittorrent.client&hl=en_US&gl=US
Stray away from uTorrent with at any chance you've got. ~~It looks like there's an official BitTorrent client for Android.~~
Use Flud instead.
https://play.google.com/store/apps/details?id=com.bittorrent.client Got this App, maybe you already found something for yourself :)
If you click the magnet 🧲 link you can down via that. but you need an app like BitTorrent
I use the "official" BitTorrent client on Android and it works fine.