In PHP 8.4, declaring functions/methods with parameters containing null as a default value, but without null as one of the types (either as a nullable syntax or as a Union type with null) is deprecated.
https://php.watch/versions/8.4/implicitly-marking-parameter-type-nullabl...
phpcs --standard=SlevomatCodingStandard --sniffs=SlevomatCodingStandard.TypeHints.NullableTypeForNullDefaultValue
FILE: /app/docroot/modules/contrib/external_entities/src/Entity/ExternalEntity.php
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FOUND 1 ERROR AFFECTING 1 LINE
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184 | ERROR | [x] Parameter $annotation has null default value, but is not marked as nullable.
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PHPCBF CAN FIX THE 1 MARKED SNIFF VIOLATIONS AUTOMATICALLY
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FILE: /app/docroot/modules/contrib/external_entities/src/ExternalEntityAccessControlHandler.php
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FOUND 1 ERROR AFFECTING 1 LINE
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89 | ERROR | [x] Parameter $items has null default value, but is not marked as nullable.
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PHPCBF CAN FIX THE 1 MARKED SNIFF VIOLATIONS AUTOMATICALLY
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FILE: /app/docroot/modules/contrib/external_entities/src/StorageClient/ExternalEntityStorageClientInterface.php
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FOUND 1 ERROR AFFECTING 1 LINE
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40 | ERROR | [x] Parameter $ids has null default value, but is not marked as nullable.
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PHPCBF CAN FIX THE 1 MARKED SNIFF VIOLATIONS AUTOMATICALLY
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FILE: /app/docroot/modules/contrib/external_entities/src/Plugin/ExternalEntities/StorageClient/Rest.php
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FOUND 1 ERROR AFFECTING 1 LINE
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279 | ERROR | [x] Parameter $ids has null default value, but is not marked as nullable.
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PHPCBF CAN FIX THE 1 MARKED SNIFF VIOLATIONS AUTOMATICALLY
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FILE: /app/docroot/modules/contrib/external_entities/src/RouteProcessor/RouteProcessorExternalEntityType.php
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FOUND 1 ERROR AFFECTING 1 LINE
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43 | ERROR | [x] Parameter $bubbleable_metadata has null default value, but is not marked as nullable.
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PHPCBF CAN FIX THE 1 MARKED SNIFF VIOLATIONS AUTOMATICALLY
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FILE: /app/docroot/modules/contrib/external_entities/src/ExternalEntityInterface.php
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FOUND 1 ERROR AFFECTING 1 LINE
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55 | ERROR | [x] Parameter $annotation has null default value, but is not marked as nullable.
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PHPCBF CAN FIX THE 1 MARKED SNIFF VIOLATIONS AUTOMATICALLY
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FILE: /app/docroot/modules/contrib/external_entities/src/ExternalEntityStorage.php
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FOUND 2 ERRORS AFFECTING 2 LINES
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223 | ERROR | [x] Parameter $ids has null default value, but is not marked as nullable.
257 | ERROR | [x] Parameter $ids has null default value, but is not marked as nullable.
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PHPCBF CAN FIX THE 2 MARKED SNIFF VIOLATIONS AUTOMATICALLY
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Needs work
2.0
Code
Actually in 3.x version it already fixed, but for case the 2.x with D10.3 and PHP 8.4 issue is still presented.