Why doesn't the POCO X7 Pro turn on or enter the charging interface immediately after being turned off and charged?

Sorry for the trouble caused to you! Zero-power-on has different performances for different chargers. When the phone is powered off due to exhaustion, it can be turned on within 4 seconds if the official standard charger/PD charger or QC charger is inserted. Non-high-power chargers or computer USB ports will first enter the charging interface and wait for a while before turning on. For the best experience and to ensure your phone powers on as quickly as possible, it's recommended to use the standard charger that comes with the phone or a compatible PD/QC charger. This will make the recovery process faster and more efficient.