According to the CDC, we know little about the risk of transmission during COVID-19 reinfections. Overall, it’s best to err on the side of caution and assume you can transmit the virus to others.
A July 2022 study found that viral shedding (aka the contagious period) among people with Omicron infections can last up to 10 days.
So, it's a good idea to isolate and quarantine for at least 10 days or until you are symptom-free and test negative from a rapid COVID-19 test.