Backup SQL database On virtual environment

Hi Experts

I have 1 physical server (named as Server A) that contain two virtual server (Server B and Server C)

On server A, i already installed backup exec 20.3 and can do backup for files from server A and hyper v files *.vhdx for Server B and C.

I also purchase an Agent for Application and Database license x 1 license

Can i use that agent to backup sql database on Server C? and which server should i install it?

Since it already backup the vhdx files that contain the sql database, is it good to enough for me to use it for DR?

Need your kind advise.

Thank you