With verbose Drush install command, a debug message is reported:
[debug] config_split commands loaded even though its constraint (^10) is incompatible with Drush 11.0.5. Broaden the constraint in modules/contrib/config_split/composer.json (see 'extra\drush\services' section) to remove this message. [10.02 sec, 100.99 MB]
Do a drush site-install with verbose output
Declare compatibility with Drush 11 or >= 10
Fixed
2.0
Code
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