Why doesn't this RewriteRule work?

Question

htaccess

Hello.
There is a request:
https://www.test.ru/zaschita-drevesiny/?filter_bra...
There is a rule:
RewriteRule ^([^.]+)/\?(filter.*)$ index.php?do=cat&category =$1&$2 [L]
It does not work for some reason, but the following one works after it:
RewriteRule ^([^.]+)/?$ index.php?do=cat&category=$1 [L]
Please tell me where the error is ?

Answer 1

GET parameters should be looked for in %{QUERY_STRING}.

RewriteCond %{QUERY_STRING} ^filter
RewriteRule ^([^.]+)$ index.php?do=cat&category=$1 [L,QSA]

Answer 2

here is happiness for you
https://donatstudios.com/RewriteRule_Generator