Cannot run multisite website locally

Good Morning

I’ve very new to WordPress but have been in IT for 30 years plus! (Not sure why I mentioned that!!)

I have a client who wants their site moved to a new hoster. I’ve found out how to do that and believe it should be pretty straightforward, however, I want to be able to view it all locally first. The current hosting company has provided me with WP and SQL backups of the site. The main issue I have is that there are multiple sites within and I cannot get WP to run. Below is a set of steps that I have followed, could someone please advise what I need to do as I think that nearly 3 days trying to resolve is detrimental to my hair?

Installed XAMMP
Started both Apache and MySQL
Imported the SQL script as per the backup supplied
Amended the siteurl and home data within WP_Options from ‘sites.domain’ to ‘localhost/sites.domain’
Reset a password (MD5) to an existing user within WP_Users
Copied the WP data into c:\htdocs\domain from the supplied backup
Renamed the wp-config.php to wp-config-sample.php in order to retain the existing config parameters
Ran the WP install
Amended the database parameters within wp-config.php
Attempted to browse to localhost/domain, this tried to redirect to localhost/sites.domain which it says it is unable to find on the server. I also tried using 127.0.0.1/domain with the same result!

Any advise would be very gratefully received.

Many thanks in advance

Steve