RTK Here v2

Here2 is a conventional GNSS receiver

Here+ is RTK single band

Here Pro is Tri band, Quad constellation RTK

If your GPS is not showing up, then you have it configured incorrectly.

Is It possible to use the Here+ as a conventional GNSS receiver when not using a RTK base to avoid the installation of two antennas (Here+ & Here2)?

Yes you can use the here+ without rtk.

Thank you. I have a ZED-F9P base that I would like to test with the Here+ and later replace with F9P rover. I have both Here2 and here+ but No space for both.

I use a F9P base with the here+. It works well despite having read that they will not work together.

F9 works fine as a base for m8p

Yes you can use a here+ as non RTK or use both as RTK