Backport kernel being held back on Buster

Hi.

I see this:

Code:The following packages have been kept back: linux-image-amd64when I run:

Code:sudo apt update && sudo apt upgradeI'm stuck on kernel, 5.4.0-0.bpo.4-amd64. Can this be solved?

I have a virtual machine instance of Buster and it's on kernel, 5.6.0.0.bpo.2-amd64. It get's no 'kept back' warning when I update it.

Thanks.