Browser Caching Not Working

Hello

Add browser caching rules for static assets: Enabled

I see in the .htaccess file that there are new lines as might be expected:

<FilesMatch "\.(css|js|pdf)$">
<IfModule mod_headers.c>
Header set Cache-Control "public, must-revalidate, proxy-revalidate, immutable, max-age=2592000, stale-while-revalidate=86400, stale-if-error=604800"
</IfModule>
</FilesMatch>
<FilesMatch "\.(jpg|jpeg|png|gif|ico|eot|swf|svg|webp|avif|ttf|otf|woff|woff2|ogg|mp4|mpeg|avi|mkv|webm|mp3)$">
<IfModule mod_headers.c>
Header set Cache-Control "public, must-revalidate, proxy-revalidate, immutable, max-age=31536000, stale-while-revalidate=86400, stale-if-error=604800"
</IfModule>

After repeated tests with webpagetest.org , results still show that many files are not getting browser caching eg:

FAILED (No max-age or expires): https://domain.tld/wp-content/uploads/2020/03/logo-1.png

Is there an additional step/action required besides enabling this feature ?

Thanks

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