PowerEdge T340 - increase disk space on RAID 1

I have a DELL PowerEdge T340 server (OS Windows Server 2019) with two 1TB HDD SATA in RAID 1, I would like to increase the size of the disks to at least 2TB. So my idea is to buy 2 new disks...

What is the correct procedure to do this?

I seem to have understood that I can proceed to replace one disk at a time since they are hot swappable even with the machine turned on. Wait for RAID 1 to be rebuilted on the new disk and proceed with the other disk with the same operation.

Once the disks have been replaced, however, I imagine that the available space will still be 1TB. How do you expand the capacity to 2TB while also showing the unused space? From which interface or which procedure should I perform?

If there is a smarter and more efficient solution let me know, I'm open to all suggestions. Bear in mind that I don't have much experience and therefore I would like to perform a fairly simple procedure.

Thanks to anyone who can give me some suggestions