Yes—this can be normal on the D3200, depending on the lens and exposure mode.

If you’re using a manual-focus lens without CPU contacts, the D3200 does not meter with it, so you must use manual exposure and estimate exposure another way. Common workarounds are:

• use an external light meter or smartphone light meter app
• use the Sunny 16 rule
• take test shots and adjust using the LCD preview and histogram
• meter with another camera

If you mean you are using manual focus and manual exposure together, the viewfinder may show the focus confirmation/telemeter instead of the light meter. In that case, you can:

• switch to Aperture priority or Shutter priority so the camera handles exposure
• briefly switch to autofocus to read/set exposure, then return to manual focus
• use a handheld meter

In short: the D3200 has limited support for older manual/non-CPU lenses, so these are workarounds rather than a full fix.