I use one of these:

https://redpark.com/usb-c-serial-cable/

From: NANOG <nanog-bounces+webnetwiz=gmail.com@nanog.org> on behalf of Randy Bush <randy@psg.com>
Date: Tuesday, September 24, 2024 at 4:43 PM
To: Fabian Mauchle via NANOG <nanog@nanog.org>
Subject: Re: db9f to usb-c serial

> https://www.metabee.com/usb-type-c-to-rs-232-serial-db09-female-adapter-cable-with-100cm-round-black-cable.html

oooooooo!