In Qistas, by Muhammad Faruqi Thanawi (student of Shah Ishaq and Imam Fazl-i Haqq), this istifta is sent regarding Zayd. I can't work out some words but it seems to say that Zayd bases his aqidah from the
athar of Sayyiduna Abd-Allah b. Abbas. He believes in Sayyiduna RasulAllah ﷺ as the
Khatam Haqiqi, but also believes in six further Khatams as
Khatam Idafi, just as there are six further Adams as
Adam Idafi. Zayd says he can repent from this aqidah if needs be. The questioner asks if this is Islamic creed.
Muhammad Faruqi Thanawi replies that this is NOT Islamic creed, but is rather a newly fabricated invention.
The rest of the answer talks about Sealship but there are a number of words I cannot make out so I do not want to guess them.
This fatwa is endorsed by many scholars, and perhaps even Mufti Irshad Husayn Rampuri (there is an endorsement of a Muhammad Irshad Husayn, and his endorsement is placed next to the Rampur scholars, so this may be the famous Mufti Husayn Rampuri as the timelines also match)