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So I believe you want not only to change "upload_max_filesize", but also "post_max_size", the latter exceeding the former in value. See this forum link for hints
It wouldn't hurt to clarify how many files you're allowed to upload under the "max_file_uploads", keeping in mind that the total size in upload no matter the number of files cannot exceed the post_max value. I think the default to max_file is 20 at any rate.
It's not going to hurt to make the changes in the php.ini script in both /etc/ and in /etc/opt/rh/rh-php72/, the former config file being for the default v5.4. Make sure you restart the associated services, at command line -