>I haven't heard of any laptop coming without a network connector, unless it's really old or really cheap. If it really comes without it, you may have to buy an external adapter. Google "usb network adapter ethernet" and you will find a lot of different models.

Lenovo Thinkpad P1 Gen 3 series is without RJ45 connector. It's not cheap nor very old.
see tech specs here https://www.lenovo.com/us/en/laptops/thinkpad/thinkpad-p/ThinkPad-P1-Gen-3/p/22WS2P1P1N3