Please help

Would there be any pcs I would be able to make or buy prebuilt for my son to play mainly plays Fortnite Roblox Minecraft fifa rocket league to a good standard

New build
• ⁠no Existing parts/monitors to reuse? (List with models/links)
• ⁠PC purpose? (Gaming, editing, etc. List apps/games)
• ⁠Purchase country? Uk
• ⁠Monitors needed? (Number, size, resolution, refresh rate)
• ⁠Budget range? (Include tax considerations)
• ⁠WiFi or wired connection?
• ⁠Size/noise constraints?
• ⁠Color/lighting preferences?
• ⁠Any other specific needs?