Below is the list of 30 free PBR / HD textures websites.
https://polyhaven.com/textures
https://ambientcg.com/list?type=Atlas,Decal,Material
https://www.textures.com/library
https://www.cgbookcase.com/textures
https://freestocktextures.com/texture/
https://cgmood.com/materials?category=materials&maxcredits=free
https://www.poliigon.com/textures?credit=0
https://www.sketchuptextureclub.com/textures
https://cgtricks.com/resources/textures/
https://www.cadnav.com/textures/
https://www.3dassets.one/#order=latest
https://publicdomaintextures.com/elementor-112/
https://patternpanda.org/library.html
https://www.lotpixel.com/texture-library?credit=free