Redirects in htaccess

I am having issues with URL redirection on my Multisite. Every URL I enter redirects to one domain and it should not do this.

I need it to be set up so the domains will redirect(>) like this:

https://www.domain1.com > https://www.domain1.com
domain1.com > https://www.domain1.com
sub.domain1.com > sub.domain1.com
sub.domain2.com > sub.domain2.com
sub1.domain2.com > https://www.domain1.com
sub2.domain2.com > https://www.domain1.com
sub3.domain2.com > https://www.domain1.com

Right now each of these redirects to https://www.domain1.com.

Any help would be much appreciated. I can do these redirects all day long in a web.config file, but working in a .htaccess is new to me.

This is my current .htaccess file:

RewriteEngine On

RewriteCond %{HTTP_HOST} !^(www\.domain1\.com)?$
RewriteRule (.*) https://www.domain1.com/$1 [R=301,L]

#BEGIN WORDPRESS
RewriteEngine On
RewriteBase /

RewriteRule ^index\.php$ - [L]

# add a trailing slash to /wp-admin
RewriteRule ^wp-admin$ wp-admin/ [R=301,L]

RewriteCond %{REQUEST_FILENAME} -f [OR]
RewriteCond %{REQUEST_FILENAME} -d
RewriteRule ^ - [L]
RewriteRule ^(wp-(content|admin|includes).*) folder/$1 [L]
RewriteRule ^(.*\.php)$ folder/$1 [L]
RewriteRule . index.php [L]