'webp fallback jpg using htaccess

I use webp format by default in images, I want to show the jpg version in browsers that do not support webp.

I want to do this using htaccess, my code converts jpg to webp, how can I reverse this?

<IfModule mod_rewrite.c>
  RewriteEngine On

  RewriteCond %{HTTP_ACCEPT} image/webp

  RewriteCond %{DOCUMENT_ROOT}/$1.webp -f

  RewriteRule (.+)\.(jpe?g|png|gif)$ $1.webp [T=image/webp,E=REQUEST_image]
</IfModule>

<IfModule mod_headers.c>

  Header append Vary Accept env=REQUEST_image
</IfModule>

<IfModule mod_mime.c>
  AddType image/webp .webp
</IfModule>

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'webp fallback jpg using htaccess

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