This is already in production, it was released on December 2023 together with other notifications like selling and item or receiving royalties :D

Yes please, I think especially with new users they may not know when they have received a bid. I personally check bids daily, but a notification would be very useful.

Great idea. Much needed.

This is a great idea and it will definitely be part of a Notification System once it's released (hopefully during 2023).