Wordpress - 5 site directories by region on separate domains - how to synchronize common settings between copies?

Question

CMS

Now there are 5 catalog sites (Woocommerce in catalog mode).
One region of the Russian Federation - one site. By design, settings, presentation - everything is the same. The product content itself, the main pages are different. Each site is on a separate domain.
Now the question is, with planned updates, finishing - you need to multiply all actions by 5. Is it possible to somehow make a single core, or synchronize the main settings between these sites.
Now there are a lot of language plugins for WP, WPML is the most famous and fancy one. It allows for each language its own content. It also supports the location of the language versions of the site each on its own subdomain.
Is it possible to do something similar, but only so that instead of choosing a language there is a choice of a city?
Tell me which direction to go. Thank you.

Answer 1

Also, a multisite was invented for this https://codex.wordpress.org/%D0%A1%D0%BE%D0%B7%D0%... and also https://wpmag.ru/2014/wordpress-multisite/

Answer 2

I haven’t seen this plug-in, maybe it’s impossible, but why, on the client side, do not disguise the choice of language as the choice of the city.
Almaty - English
Cheboksary - French
and so on.

Answer 3

If I'm not mistaken, create a wp network and already manage it as you need. ( one , two )