Close not exactly

https://chasingpaper.com/products/heritage-floral?variant=45048358666393

https://www.wallpaperfromthe70s.com/wallpaper-mughal-white

I think it’s Jasper Devonshire.

One place that sells it, google for others:

https://ladesignconcepts.com/shopping/wallcoverings/5002-01-devonshire-blue-green-jasper-wallcovering/

From Instagram, to show scale of pattern:

I see the colors you show in their Devonshire fabric line, but not wallpaper. Maybe try contacting them.

Jasper Devonshire Blue/Green Wallpaper

https://ladesignconcepts.com/shopping/wallcoverings/5002-01-devonshire-blue-green-jasper-wallcovering/

The image/ colorway you love is not the wallpaper, or it is a colorway discontinued in the wallpaper. It's the Michael Smith/Jasper fabric, and and was quite likely simply used on a wall

That colorway does not exist in the wall paper.

The Image Jilly provided above, does: ).

An example below, and you'd never guess : ) it was FABRIC

Remember when many people here on the forums were covering walls with fabric? Late 1990's to early 2000. The positive was that it was easier to put up and take down.