Limitations of spread operator in MicroPython

[Josverl]

Is this a known documented limitation or difference ?

MicroPython v1.26.1 on 2025-09-11; Generic ESP32 module with ESP32
>>> a = {"x": 1, "y": 2}
>>> {**a}
Traceback (most recent call last):
  File "<stdin>", line 1
SyntaxError: invalid syntax
>>>

CPython 3.11.9

>>> a = {"x": 1, "y": 2}
>>> {**a}
{'x': 1, 'y': 2}
>>>