Before You File a Bug Report Please Confirm You Have Done The Following...

• I have tried restarting my IDE and the issue persists.
• I have updated to the latest version of the packages.
• I havesearched for related issues and found none that matched my issue.
• I haveread the FAQ and my problem is not listed.

Playground Link

https://typescript-eslint.io/play/#ts=5.7.2&fileType=.ts&esQuery=N4IgZglgNgLgpgJxALhCAvkA&code=JYOwLgpgTgZghgYwgAgEIHsAeyDeAoZZANzgBsBXCALmQGcwpQBzAbjwF888ATCBUuFBQxyIBGGDoQyJhDAAxMqQBGiANYZMACgCUNTWx58BQ5Ain1kveOVJhNNHMjiPky-VmQAfZKOugIbmR2YMNefkEUcxBLazhbeywAeQAHCSkyVzgAfldlXLRPHz8IGACgkPZDAHpq5CEU9CgwWjMmoXFSAE8jGztNADo4AeVkAEIAXmQQW1JkbKtS%2BP6sIZHkGlkFJVUEDSxdGrraAAt0WyCGprBe5cTMVPSQMiHs9cnp2fnFvvvHyWepFe602ckUpBU6k0hy4tToZwuzlItHQ9QgjWatwSmn%2BGSBOXeUxmEO%2BcWxyTSAJew1GoO2EN2%2B20OhYQA&eslintrc=N4KABGBEBOCuA2BTAzpAXGUEKQAIBcBPABxQGNoBLY-AWhXkoDt8B6Y6RAM0WlqYSNkAC1pkA9gEMkyMswDm6KL2jjokcGAC%2BILUA&tsconfig=N4KABGBEDGD2C2AHAlgGwKYCcDyiAuysAdgM6QBcYoEEkJemy0eAcgK6qoDCAFutAGsylBm3TgwAXxCSgA&tokens=false

Repro Code

interfaceBox{value:string;}declarefunctiongetFallbackBox():Box;declareconstdefaultBox:{a:{b:Box|undefined}};declareconstdefaultBoxOptional:{a?:{b?:Box|undefined}};// reports correctlydefaultBox.a.b!=null ?defaultBox.a.b :getFallbackBox();// should reportdefaultBoxOptional.a?.b!=null ?defaultBoxOptional.a?.b :getFallbackBox();// should also reportdefaultBoxOptional.a?.b!=null ?defaultBoxOptional.a.b :getFallbackBox();

ESLint Config

module.exports={parser:"@typescript-eslint/parser",rules:{"@typescript-eslint/prefer-nullish-coalescing":"error",},};

tsconfig

{"compilerOptions": {"strictNullChecks":true  }}

Expected Result

I expected all cases above to be reported with a suggested fix.

Actual Result

Only the first case (member-expression) is reported.

Additional Info

I think the third case (chain-expression with a member-expression as an alternate) is the more common case, asno-unnecessary-condition will flag the second case (chain-expression).