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try these https://www.screwfix.com/p/tp-link-tl-pa4022p-kit-av600-2-port-powerline-starter-kit/926kr
Run off the mains cabling and should carry 300mbps. They're what I used to carry wifi to my shed
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Get a mesh system. Loads of different types available. We have these and they cover the whole house and my office in the shed at the bottom of the garden. There are load of different makes and models available to suit.
Ten years ago I took the piss out of my mate because he was wiring his house with ethernet cable. 3 kids later and i wish id done it myself in our new place. BT boosters do the job but the shear amount of data knocking around with 2 WFH adults and 3 kids on tabs / xbox let alone IOT is crazy.
Currently running long ethernet cables through the house during the day and removing at night!