Cyclone 10 MSEL Pins

You want to refer to the most recent Cyclone 10 device handbook which has a dedicated table for devices with 3 MSEL lines. As with previous Cyclone devices, the small FPGA types have MSEL2 and 3 bonded to MSEL 2 pin.

The posted table seems erroneous. The recent doc is clarifying that the configuration voltage selection refers to VCCIO in which the configuration pins reside.

I believe that using VCCA as MSEL high level isn't an absolute requirement. It's however essential that the MSEL level is valid when VCCA powers up, connect it to VCCA is the straightforward way to achieve it.