Any subdomain point to internal directory with .htaccess

I was trying to run a few stackoverflow
solutions but none of them was working
for me

I want any subdomain would show the
content of the internal directory.

for example :

test.example.com

would take it’s content from :

example.com/subdomains/test

just to clarify i do not want to
redirect to the internal directory
I still want it to appear as if it’s
real subdomain so the URL should
remain

test.example.com

I tried:

RewriteCond %{HTTP_HOST} ^(.*).example.com
RewriteRule ^(.*)$ https://example.com/subdomains/%1