How many days can you stay in Amman?

This depends on what kind of visa you apply for.

Visa on arrival: To apply for a 14-day visa on arrival, you need to travel as a group or individual organized by a Jordanian tourism agency or travel agency, or

or take a Royal Jordanian flight to the King's Airport You can apply for a visa on arrival at the airport (AMM) and Queens Airport (AQJ). The visa fee is 10 Jordanian dollars per person. Special regulations for women: only issued to Chinese women who are accompanied by male family members or who participate in travel agencies. Contracting parties generally issue single-entry visas that are valid for three months. There are uncertainties in the actual operation of applying for a visa on arrival, so it is recommended that citizens coming to Jordan still need to apply for a visa in advance at the Jordanian embassy in China

if there is no emergency.

Transit visa: The Contracting Party does not issue transit visas. Passengers who have booked connecting tickets and are going to a third country via Jordan will transfer directly without leaving the airport if the transfer time is less than 6 hours. The airline will arrange accommodation in a nearby hotel with a transit card within 6 to 48 hours. If the transfer time exceeds 48 hours Hours require a visa.

So theoretically you can stay in Amman, Jordan for up to 14 days.

I hope my answer will be helpful to you and I hope you will adopt it.