Baha'u'llah is the expected Builder of the Temple!

Baháʼu'lláh presented Himself to the Templar leader Georg David Hardegg, to whom the Lawḥ-i-Hirtík (Tablet to Hardegg) was addressed, as "the Wronged One" and the possessor of the "Word of God" flowing from the "spring of the Will of the King of Existence". Drawing on the Templars’ chiliastic beliefs and their presence in the Holy Land, Baháʼu'lláh made the claim that He was "assuredly, the expected Builder of the Temple" and the promised "Healer of Infirmities". He directly referenced the Templers' expectation that the theophany (ẓuhúr) was nigh, but noted that they remained in great heedlessness despite having come to attain His presence.

• Hardegg's Initial Attempts (c. 1871): Hardegg, who was investigating Baháʼí beliefs and history, "failed to gain an interview with Baháʼu'lláh himself". However, he did manage to have an interview with Baháʼu'lláh's eldest son, ‘Abdu’l-Bahá, on June 2, 1871, in ‘Akká’. Hardegg had been spending "considerable time and effort trying to discover the actual basis of their belief" and had dealings with the Baháʼís through an interpreter around the same time.
• Later Attempts (October 1872): Hardegg, along with the missionary James J. Huber, traveled to ‘Akká’ in October 1872, having been "promised an interview with Bahá’u’lláh by some of the Bahá’ís". Despite this promise, the interview with Baháʼu'lláh did not occur.
• The Context of the Refusal (c. 1872): The source suggests that the failure of this 1872 attempt may have been "as a result of Bahá’u’lláh’s withdrawal in the house of ‘Údí Khammár". This withdrawal followed tensions between the Baháʼís and the Azalís (followers of Baháʼu'lláh’s half-brother) that culminated in the murder of several Azalís.
• Baháʼu'lláh's Commentary: Baháʼu'lláh Himself addressed Hardegg’s request in a Tablet written around 1875. He explicitly stated that Hardegg’s desire "to attain [My] presence but this request did not find acceptance in the most holy court".
• The Alternative: Instead of granting the physical interview, Baháʼu'lláh revealed the Lawḥ-i-Hirtík. He noted that a "sublime and Most-Holy scriptural Tablet (Lawḥ-i-amna‘-i-aqdas) was specifically sent down for him". This Tablet was declared to establish the path for every righteous person to attain salvation and reach the goal.

(Tablet to Hardegg (Lawh-i-Hirtík): A Tablet of Bahá'u'lláh to the Templer Leader Georg David Hardegg, translated by Stephen Lambden and Kamran Ekbal)

https://bahai-library.com/pdf/irfancolloquia/lights4_lambden_ekbal_updated.pdf