I've deleted several pages and tags from my site, and bases on my SEO recommendations I've redirected them to 410.

I've done that in my .htaccess file this way:

RewriteRule ^tag/lorem/?$ - [G]
RewriteRule ^tag/ipsum/?$ - [G]
RewriteRule ^tag/dolor/?$ - [G]
RewriteRule ^tag/amet/?$ - [G]

At the end of the .htaccess I've defined the ErrorDocument 410 and I want it to go to a page I've created on Wordpress

ErrorDocument 410 /error-410/

The thing is it sends me to that page, but it gives me a 302 instead a 410 on the headers

Request URL: /tag/routers/
Request Method: GET
Status Code: 302 Found
Remote Address: [::1]:80
Referrer Policy: no-referrer-when-downgrade

What am I doing wrong?

Thanks in advance