According to the search results, there are different accounts of what happened to Jar Jar Binks after Order 66. Here are the different possibilities:

• Banished from Gungan city: According to CultureSlate, Jar Jar was banished from the Gungan city once again and nobody wanted to take him in. He ended up back on Naboo, making a meager living as a silly clown.

• Retired to Naboo: According to a Reddit post, Jar Jar retired to Naboo, ostracized from society and reviled by the adults due to his part in bringing Palpatine to power. He lived life as a silly clown.

• Hiding: According to a YouTube video, Jar Jar went into hiding after Order 66.

• Representative for Naboo: According to StarWars.com, Jar Jar left the swamps of Naboo to enter the even murkier waters of Coruscant politics, becoming a representative for his people in the galactic capital. There, his best intentions and eagerness to serve were exploited by scheming Senators and others in positions of power.

It is worth noting that the idea that Jar Jar was a powerful Sith Lord who used his force powers during the battle of Endor to help the Empire is a fan theory and not part of the official Star Wars canon.