There is a 301 redirect, in .htaccess it is not (wordpress) where can a redirect be buried?

Question

htaccess

I don't understand:
The content of .htaccess is almost standard, but it still sends from all domains to the technological (technical)
I bought another domain (my00.host) specially, connected it. DNS records have been updated and when loading the address, it still sends it to the technological domain.
cPanel doesn't have any redirects either.
What else can be? Obviously it's the site itself. Where can this redirection be buried?
CMS - WordPress, cPanel, hosting - regRU
connected domains:
my00.host
centrputi.site
technological:
u0810483.cp.regruhosting.ru

Answer 1

Forcibly disabled redirects by entering this in wp-config.php:
define('WP_HOME', 'http://' . $_SERVER['HTTP_HOST']);
define('WP_SITEURL', 'http://' . $_SERVER['HTTP_HOST']);
And the site immediately stopped loading with an error:
define('WP_HOME', 'http://' . $_SERVER['HTTP_HOST']); define('WP_SITEURL', 'http://' . $_SERVER['HTTP_HOST']);
Warning: Cannot modify header information - headers already sent by (output started at /var/www/u0810483/public_html/wp-config.php:1) in /var/www/u0810483/public_html/wp-includes/pluggable.php on line 1251
Warning: Cannot modify header information - headers already sent by (output started at /var/www/u0810483/public_html/wp-config.php:

Answer 2

Cannot modify header information

https://codex.wordpress.org/%D0%A7%D0%90%D0%92%D0%...
and it's better to run right away with reg.ru...