Aḥmad Riḍā Khān Barelwī states:
“That being [of the Prophet] Allāh Ta‘ālā has made without likeness and without equal. An equal to Ḥuḍūr Aqdas (ṣallallāhu ‘alayhi wasallam) is intrinsically impossible. It isn’t even within [Divine] Power. It cannot occur, neither within the earlier ones nor the later ones; neither from the prophets nor the messengers.” (Malfūẓāt A‘lā Ḥaḍrat, Dawat e Islāmī, p. 400)
See how he limits divine power to allow for this warped understanding. Any person with sense can see this is disrespectful to Allāh.
If Allāh has created something, He of course has the power to create a likeness of it. Whether He will do so or not is another matter.
The Prophet (ṣallallāhu ‘alayhi wasallam) is a creation of Allāh. Hence, creating his likeness is within Allāh’s power. But of course, Allāh will never create such a likeness.
In several places, the Qur’ān argues for Allāh’s power over something based on His power over something similar to it. Like His saying: “[He] is the One Who sent down water in measure from the sky, and We revived thereby dead land – thus will you be brought forth.” (43:11) It goes against Qur’ānic logic to say that Allāh has the power to create the Prophet (ṣallallāhu ‘alayhi wasallam) himself but not his likeness.
Only things that are intrinsically necessary (Allāh’s being and His attributes) or intrinsically impossible (e.g. a partner to Allāh) are excluded from divine power. Apart from that, everything is within divine power. Something that is like a possible entity is of course also only possible (otherwise, it would not be “like” it), not necessary or intrinsically impossible.