Resolved in the new v1.24.6 release. Please update your DDEV.

Preliminary checklist

• I am using the latest stable version of DDEV (see upgrade guide)
• I have searched existing issues
• I have checked the troubleshooting guide
• I have run ddev debug test to include output below

Output of ddev debug test

No ddev debug test needed, see explanation

Expected Behavior

TYPO3 backend login page should be shown

Actual Behavior

You see an error page, that the page is unknown.

• fix: support TYPO3 v14 nginx configuration, fixes #6944 #7230 updated the TYPO3 nginx configuration for TYPO3 v13/v14

Steps To Reproduce

1. Go to https://your.site/typo3
2. See Error page instead of TYPO3 login

Anything else?

The new inserted "map" to check the index.php location always uses the root index.php (and never the one in /typo3/ directory) so this why it works with TYPO3 v13 and v14 but not with v12 (and older) anymore.

I also do not understand to use the map ... the try_files syntax would have been

try_files $uri /typo3/index.php$is_args$args /index.php$is_args$args; <= Wrong, try_files do not work as that

Yes, this won't work in v13 with the configurating a different entry point like

$GLOBALS['TYPO3_CONF_VARS']['BE']['entryPoint'] = '/admin';

but this also didn't worked in ddev out of the box before.