Arizona’s Family has the complaint here:

A complaint filed Thursday with the Federal Election Commission asks regulators to open a formal investigation into campaign spending by Arizona Sen. Kyrsten Sinema. Sinema has faced mounting questions about the legitimacy of more than $180,000 in campaign expenditures dating back to 2019 on luxury hotels, posh resorts, Michelin-star restaurants, international travel and winery visits. The campaign spending has drawn further scrutiny because it occurred while Sinema was not actively campaigning for office. The senator has declined to announce whether she will run for reelection in 2024.