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• I have searched for related issues and found none that match my proposal.
• I have searched the current rule list and found no rules that match my proposal.
• I have read the FAQ and my problem is not listed.

My proposal is suitable for this project

• I believe my proposal would be useful to the broader TypeScript community (meaning it is not a niche proposal).

Link to the rule's documentation

https://typescript-eslint.io/rules/prefer-nullish-coalescing/

Description

Followup to #10137 (comment) - in addition to the if (x) case covered by #6309 → #10137, let's also cover the if (x != null) case.

Fail

declare const callable: () => void | null;

if (callable != null) {
  callable();
}

Pass

declare const callable: () => void | null;

callable?.();

Additional Info

Probably best to consider this blocked on #10137