Update

Author: kubawerlos

src/Fixer/TypedClassConstantFixer.php

@@ -180,9 +180,6 @@ private static function isOfTypeBasedOnKinds(
         array $instantWinners
     ): bool {
         foreach ($expressionTokenKinds as $index => $expressionTokenKind) {
-            if ($expressionTokenKind === '?') {
-                return false;
-            }
             if (\in_array($expressionTokenKind, $instantWinners, true)) {
                 return true;
             }

tests/Fixer/TypedClassConstantFixerTest.php

@@ -240,9 +240,19 @@ class Bar {
             '<?php class Foo { public const BAR = 10 * FLOAT_OR_INTEGER + 3; }',
         ];
 
-        yield 'constant that can be of different types' => [
-            '<?php class Foo { public const mixed BAR = SHOULD_BE_INT ? 1 : ["one"]; }',
-            '<?php class Foo { public const BAR = SHOULD_BE_INT ? 1 : ["one"]; }',
+        yield 'constants that can be of different types' => [
+            <<<'PHP'
+                <?php class Foo {
+                    public const mixed BAR = SHOULD_BE_INT ? 1 : ["one"];
+                    public const mixed BAZ = NAME === 'A' . 'b' ? 1 : ["one"];
+                }
+                PHP,
+            <<<'PHP'
+                <?php class Foo {
+                    public const BAR = SHOULD_BE_INT ? 1 : ["one"];
+                    public const BAZ = NAME === 'A' . 'b' ? 1 : ["one"];
+                }
+                PHP,
         ];
 
         yield 'constant that can be of different types - more complex case' => [