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Sorry to hear you’re facing problems 
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nextcloud 29.0.7
Debian 12 bookworm WSL2
Latest apache in snap package
Latest PHP in snap package
The issue you are facing:
Nextcloud shows up in www root (http://my.ip.address) rather than http://my.ip.address/nextcloud. How do I go about getting it to open as http://my.ip.address/nextcloud?
An alternate port would work equally well. In fact, I’d greatly appreciate knowing how to do both.
Thanks so much
Joe
Is this the first time you’ve seen this error? (Y/N):
Y
Steps to replicate it:
Install via snap
Connect to www root via IP provided bt
The output of your Nextcloud log in Admin > Logging:
N/A
The output of your config.php file in /path/to/nextcloud (make sure you remove any identifiable information!):
N/A
The output of your Apache/nginx/system log in /var/log/____:
N/A
Output errors in nextcloud.log in /var/www/ or as admin user in top right menu, filtering for errors. Use a pastebin service if necessary.
N/A