Hi @chok_dee,
I think the effect of the PATH setting is lost because sudo resets it entirely.
You can see this from
PATH=/whoops /usr/bin/sudo env
where the PATH is in fact reset to a default one, not inherited from your non-root shell.
You might be able to get it to find your apachectl with something like
sudo env PATH=$PATH:/usr/local/apache/bin ./certbot-auto --apache
or by running an interactive shell with sudo -s and then changing your PATH from within that shell before running certbot-auto.