It primarily depends on the USB-C-to-LAN RJ45 adapter and the Chip installed in it. My experience is that not every adapter is compatible with every smartphone and every firmware / custom ROM.
My Gigaset GS290 works with Gigaset stock Android 10 and /e/OS ‘R’ V.11 with a No-Name / No-branding China-Adapter and with the Samsung DeX Station