This appears to be a watchface that you downloaded from the IQ Store and is not from Garmin. The best thing would be to ask the developer. But if you ask me, I guess the symbol at the top is the barometric pressure in hPa, and the other is the message counter.
I have that watch face... 3 is your notification count. When you don't have notifications (ie texts, emails etc) it will display AM/PM. The other symbol is pressure I believe in millibars. Many of these watch faces don't have user manuals / support doc, a good way to figure out what fields are what is to toggle them in settings then you can see what fields are what based on the settings.
