Hi,
I checked there are 2 .htaccess under WordPress directory.
1 is under wordpress
1 is under wp-contect\plugins\akismet
I just checked the files, I didb’t find this sentence “cross-origin-embedder-policy: require-corp”
if that doesn’t work maybe a plugin is overriding your headers, try deactivating all plugins and see if the issue is solved, then try activating them one by one to find the one causing the issue. ==> I will check later, thanks.