brand is irrelevant

not sure where you live but if you have access to amazon then amazon basics cables will be just fine https://www.amazon.com/AmazonBasics-RJ45-Cat-6-Ethernet-Patch-Cable-10-Feet-3-Meters/dp/B00N2VIALK

I already purchased the below which should be sufficient I think?

-surge suppressor receptacle (https://www.amazon.com/dp/B0039UUMJM)

-3 fresh hdmi cables at 6.6 feet length - it's not a long distance (https://www.amazon.com/dp/B08M9HND4F) - I already have one trusted cable I'd keep with the new tv in case there's some issue with the new ones since I believe the tv has 4 ports

-1 fresh ethernet cable for the tv itself - though I'll probably use the streaming stick mostly (https://www.amazon.com/dp/B00N2VIALK)

-the tv itself comes with a flush mount