Laravel PUT request to API via Postman not working.

routes/api.php

// UserController Routes (Requires authentication)
Route::middleware('auth:sanctum')->controller(UserController::class)->group(function () {
    Route::get('/profile', 'getProfile');
    Route::put('/profile', 'updateProfile');
});

Controllers/UserController.php

    /**
     * Update the authenticated user's profile information.
     *
     * @param UpdateProfileRequest $request
     * @return JsonResponse
     */
    public function updateProfile(UpdateProfileRequest $request): JsonResponse
    {
        try {
            // Get the authenticated user
            $user = $request->user();

            // Handle the Avatar upload
            if ($request->hasFile('avatar')) {
                // If there is an existing avatar, delete it from storage
                if ($user->avatar) {
                    $existing_avatar = str_replace('/storage/', '', $user->avatar);
                    Storage::disk('public')->delete($existing_avatar);
                }

                // Store the new avatar
                $avatar = $request->file('avatar')->store('user_avatars', 'public');
                $user->avatar = Storage::url($avatar);
            }

            // Update the user's profile information, including the avatar if it was uploaded
            $user->update($request->validated());

            // Return the updated user data
            return response()->json([
                'success' => true,
                'message' => 'Profile updated successfully.',
                'data'    => $user,
            ]);
        } catch (Throwable $e) {
            // Log the error message
            Log::error('Error updating user profile: ' . $e->getMessage());

            // Return an error response
            return response()->json([
                'success' => false,
                'message' => 'An error occurred while updating the profile.',
            ], 500);
        }
    }

I'm currently testing this endpoint with Postman form-data. On sending the request, the fields are not being updated. So I tried logging the request fields but it returned an empty array. After noticing that, I switched the method to a POST method both on Postman and in the api.php file. To my surprise, it returned the fields. What could be the cause of this behavior. Please am I doing something wrong here.

PS: before returning the request, I removed ": JsonResponse" type hint from the updateProfile method.