To what extent is it true that words such as: "Ahabb Hib Hiboo Hibbi," "Shubra Amra Shams Nujoom," and "Inqali' La'aqsa Qareeḥ" are names of jinn and are used to summon them or seek their aid, and what is the response to those who believe and propagate such statements?

You must verify what is published for Muslims, for Allah holds one accountable for speaking without knowledge. There is no evidence to support the claims about the names of jinn mentioned in the question, nor to deny them.

The believer is protected by Allah's preservation if they adhere to His commands, avoid His prohibitions, and fortify themselves with the prescribed remembrances, for Allah protects His servants from evil. Therefore, it is impermissible to portray the matter as if jinn dominate Muslims without deterrence.

We do not rule out that incomprehensible words may contain names of jinn. Sheikh al-Islam Ibn Taymiyyah mentioned that devils appear to those who worship other than Allah with names they assume belong to angels, but which are in fact names of jinn.

Hence, scholars have stipulated that a valid ruqyah (definition) must be in understandable Arabic, so that a Muslim does not unknowingly call upon jinn and seek their help. Unknown ruqyahs or those not in Arabic are reprehensible due to the possibility of containing disbelief.

If the words are understandable Arabic, then there is no harm in using them in ruqyah. Exaggeration in these matters indicates ignorance, superstition, and weak certainty in Allah.