The mos model of the ESC you have is VS3698AP. Voltage 30V, current 105A. The reason why there is only one Electrolytic capacitor is that there is not enough space, so we use more expensive patch Ceramic capacitor nearby

Hi! Nice work! Is it necessary to flash tail esc with bidirectional set up?

However, your approach can also be used. It is recommended to use a smaller BL ESC like the V1 version. However, please note that the BEC voltage should not be lower than 6V and the output current should not be lower than 5A