Tv frames from US brands and US-based sellers
Amazon ranks by what sells fastest, so a tv frame from an established brand gets buried under cheap imports no matter how far you scroll. This page lists the US brands and US-based sellers for tv frames, so you can start from the ones worth trusting.
We read each seller's registered country from Amazon's own published seller info. We don't claim anything here is manufactured in the US, only that you're buying from a US brand or a US-based seller.
Confirmed US brands and sellers
7 listings where Amazon's own seller info places the seller in the US. Each badge says which.

ECHOGEAR MaxMotion TV Wall Mount for Large TVs 42" to 90" - Full Motion Has Smooth Swivel, Tilt, & Extension - Universal Design Works with Samsung, Vizio & More - Includes Hardware & Drill Template

Mount-It! TV Ceiling Mount Bracket, Full Motion 360° Rotation, Fits 32–75 Inch Screens up to 110 lbs, VESA 200x200 to 600x400, Height Adjustable 22–36 Inches, Flat or Vaulted Ceilings, Black (MI-509B)

SANUS Tilting TV Wall Mount for 42" to 90" TVs - Low Profile & Universal Design - Fight Screen Glare - Easy 3-Step DIY

WALI Floor TV Stand with Power Outlet & AV Shelf, Tall TV Stand Mount for 36-75 inch TV up to 110 lbs, Swivel and Height Adjustable TV Stands with Wood Base for Bedroom, Office(TVDVD-6P), Black

Monoprice Premium Height-Adjustable Above Fireplace TV Wall Mount Motorized Electric for 37" to 80" TVs up to 77lbs, Max VESA 600x400

Rocketfish Tilting TV Wall Mount for 32 to 90-Inch Flat-Panel TVs

VIVO Rolling Artistic 43 to 75 inch LED LCD Screen Mobile Studio TV Easel Stand, Wood Accessory Shelf, Adjustable TV Mount with 4 Walnut Legs, Black Frame, STAND-TV75R