

create a simple landing home page with business info then, either self host or create accounts related to the business on fediverse services; use them for interaction, branding, advertising etx. link those social media accounts on the website home page.
If it’s not been mentioned, you want Commercial Displays, or Large Format Displays. Much more expensive generally for less features, but many are explicitly non-smart.
https://www.cdw.com/content/cdw/en/products/computer-monitors-displays/large-format.html