I was actually able to solve this with a completely WP method.
Since I had the user’s chosen image ID stored in the user meta I was able to get the URL using that ID
// Get the file id
$image_id = get_user_meta($userid, 'meta_field_key', true); // CHANGE TO YOUR FIELD NAME
// Get the file size
$image_url = wp_get_attachment_image_src( $image_id, 'thumbnail' ); // Set image size by name
// Get the file url
$avatar_url = $image_url;
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