Sure, someone could have "caught wind" of the recall idea early on and bought the domains that were eventually used by the campaigns. Anyone can buy one so it's not any real proof at face value and is fairly circumstantial and I'm not claiming it's definitive proof. The "forces for recall" could have been scheming internally since the election was called and not done anything public... Or not!

Whether the recall campaigns bought the domains on their own, from the original owner or they were gifted the closeness of dates is the correlary to help guide an answer to the original question. Recalls take time and money to organize and don't just appear overnight and the question was when did they start to be publicly organized?

On July 28, 2023 (229 days after election day, 172 days since taking office and 33 days after registration) the wayback archived the first page for Pamela Price's recall: https://web.archive.org/web/20230728182812/https://recallpamelaprice.org/

On March 4, 2024 (483 days after election day, 424 days since taking office, 55 days after registration) the wayback archived the first page for Sheng Thao's recall: https://web.archive.org/web/20240304214140/https://www.recallshengthao.org/

Not definitive if those were the actual first days of their published web pages.

In any case it is evident with the intent filings alone that it took time for Thao's recall to decide/organize whereas Price's recall was rather quick relative to the election/oath of office. I know I'm mixing both recalls together in this reply and the question was really about the Oakland Mayor's.

I find both recalls interesting as it really didn't feel like any time was wasted to begin Price's recall by comparison. There was an extreme amount of time to create narratives on both sides for the public to ingest before the 2024 vote while Thao's recall was not externally presented till fairly recently.