I think I’ve been here before when I first installed these certificates but now I am just renewing. Ubfirtunately the auto renew didn’t work so these have expired.
If certbot successfully renewed, the new certificates are already on your server. It depends on the method of installing those certificates on how to "implement" them. It could be you'll need to reload your webserver.
OK I paused cloudflare and the renew worked. I just resumed it and ran the dry run and with no error so I guess I wait until its due again since I believe it was Cloudflare stopping the autorenew to work.