WIFI Connectivity issues

This is the antenna mod I was referring to, because my esp doesn’t have a connector for an external antenna:

I do have an external antenna like this one:
https://www.amazon.com/Bingfu-Rosewill-Gigabyte-Wireless-Security/dp/B082SHKT3Q/ref=sr_1_2_sspa?crid=3DSG6IBPFUOT7&keywords=wifi+antenna&qid=1668924414&sprefix=wifi+anten%2Caps%2C286&sr=8-2-spons&sp_csd=d2lkZ2V0TmFtZT1zcF9hdGY&psc=1

What I’m curious about is:

  • Other esp devices that are further away have a better signal level when looking at the wifi router.
  • The big difference between the signal level my wifi router advertises (80db) as compared to what the esp advertises (40db)

That’s why I wonder whether there is an issue with the transmit power of the esp.

Thank you
Christian