You would need to use a (freemium) app for that: OneSync or AutoSync for Google Drive.

I have OneSync but I'm currently using Syncthing (to not have to buy an upgrade and to better control which files are synced). To reduce sync conflicts, I run an always online Syncthing instance in the cloud with Fly.io.

My solution to this problem, which has worked for the past 2 years, is to rely on a private git repo for sync, obsidian on desktop, and GitJournal on mobile.

I use FolderSync for Android which works well for my obsidian sync needs