Nix package search # reference-packages like python3 or nodejs not listed

Help
1

Is there a reason why reference-packages like python3 or nodejs are nor anymore listed in nix package search?

https://search.nixos.org/packages?channel=23.05&from=0&size=50&buckets={"package_attr_set"%3A["No%20package%20set"]%2C"package_license_set"%3A[]%2C"package_maintainers_set"%3A[]%2C"package_platforms"%3A[]}&sort=relevance&type=packages&query=python3

nix-env -qaP nodejs
nixos.nodejs-14_x         nodejs-14.21.3
nixos.nodejs_14           nodejs-14.21.3
nixos.nodejs-16_x         nodejs-16.20.0
nixos.nodejs_16           nodejs-16.20.0
nixos.elmPackages.nodejs  nodejs-18.16.0
nixos.nodejs-18_x         nodejs-18.16.0
nixos.nodejs_18           nodejs-18.16.0
nixos.nodejs_20           nodejs-20.2.0