Syncing Gmail on iPhone and MacBook

Hello,

I have an iPhone 13 Pro Max, and a MacBook. I have been moving some emails from my outlook email to my Gmail account on my iPhone, and I can access them in my Gmail on iPhone, but when I check Gmail on MacBook, I cannot see those same emails. It wasn't an issue in the past, but recently seems like my Gmail on iPhone is not syncing as expected to my Gmail on MacBook.

Would appreciate advice on how I can sync my Gmail folders and subfolders between devices.

Thank you in advance!