You need a switch. Plug your cable into it and then other cables to wherever you need them. This kind of thing https://www.amazon.co.uk/NETGEAR-Ethernet-Unmanaged-Internet-Splitter/dp/B07PYSNSDD
I’ve got one of these little guys
In hindsight I would buy something a bit bigger and better. It noticeably slows down when it gets hot.
I've found the metal ones are ok as the case acts as a heat sink but that's probably only any good if there's clear air around it.
Saying that, most of mine are actually ex small office ones which are probably a bit more robust.
@MarvHucker started
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You need a switch. Plug your cable into it and then other cables to wherever you need them.
This kind of thing
https://www.amazon.co.uk/NETGEAR-Ethernet-Unmanaged-Internet-Splitter/dp/B07PYSNSDD