Yeshua attended all the feasts (in John 7 he sees the feast without attending at first. He attended later secretly .Sukkot foreshadows the Millennium reign and the 8th day of this feast represents the New Jerusalem which appears after the millenium see John 7, 6 & 8 - 10 ) and the feasts will continue into the Millenium. (also on Youtube https://www.youtube.com/watch?v=w8Jh_4tK7PQ) John 9 1 - 11 describes the Pool of Siloam connected by 300 metres or so to theGihon springs
https://www.neverthirsty.org/bible-qa/qa-archives/question/what-significant-about-pool-siloam-in-john9-7/ John 7 37 - 39 describes rivers of living waters
Festival of the Water Libation 5775 https://www.youtube.com/watch?v=oK4GDsDuOSA ( Simchat Beit Hashoevah, According to the Mishnah (Tractate Sukkot 4, 9 (1) & 4,10 (2) The water for the libation ceremony was drawn from the Pool of Siloam (or alternative Hebrew: בְּרֵכַת הַשִּׁילוֹחַ Breikhat HaShiloah) in the City of David & carried up the Jerusalem pilgrim road to the Temple. Joy and celebration accompanied this procedure.
A prophetic timeline from the scriptures; After 40 days in the Desert bringing Yeshua up to the FEAST of Trumpets, & 10 Days of Awe and Yom Kippur, his ministry begins. Before this he attends John the Baptist for baptism and then his journey into the desert begins ("Then was Jesus led up of the Spirit into the wilderness to be tempted (being tempted) of the devil. And when he had fasted forty days and forty nights, he was afterward hungry "Matthew 4:1) Then within the feast timeline next he attends secretly at Sukkot (or in person openly in previous sukkot years during his ministry of 3.5 years ad indeed all his life) for a feast of great celebration and WATER libation when also Solomon dedicated the TEMPLE at Gihon 300 metree from the pool of Siloam (Gods presence came into the Temple) Jesus ministry follows the feasts and this will continue into the Millenium
John 7:37-39 King James Version
37 In the last day, that great day of the feast, Jesus stood and cried, saying, If any man thirst, let him come unto me, and drink.
38 He that believeth on me, as the scripture hath said, out of his belly shall flow rivers of living water.
39 (But this spake he of the Spirit, which they that believe on him should receive: for the Holy Ghost was not yet given; because that Jesus was not yet glorified.)
YESHUA AND THE SUKKOT WATER DRAWING FESTIVAL https://www.oneforisrael.org/holidays/yeshua-and-the-sukkot-water-drawing-festival/
Sukkot - The Feast of Tabernacles https://www.youtube.com/watch?v=phzCJz4qT5Q