The stock antennas are pretty bad. I’ve got three of them now and they are all identical. See the bottom of this post for a VNA sweep.
https://meshtastic.discourse.group/t/antenna-recommendations/2992/17
VSWR of ~3 equates to a loss of about 25% of your power.
The crazy thing about the link b8b8 posted is that is crosses over downtown Vancouver. The noise floor that the signal has to punch through must be really high.