iphone 11 charger 13 can be used, because the Apple charger is universal, so he only distinguishes between its fast charge and slow charge in general, his charger will be universal, so you do not have to worry about the weather is not the same, the charger is not the same, their chargers are the same, only fast charge and slow charge, Under normal circumstances, it would be common.
The charger for the iphone13 and iPhone11 is universal. Regardless of the 5W charger you are using now, or the PD20W fast charger purchased separately, it can be universal. If you use 5W chargers, the disadvantage is that the speed is relatively slow, 5W (5V1A) takes nearly 3 hours to fill the iPhone12. The 20W charger, fully charged with the iPhone13, took 107 minutes (1 hour 47 minutes) to actually test.