1. No, The Door Release Relay SPST is NOT Relay Door. The Door Release Relay SPST is a part of RFID system which you colored in Orange. The Door Release Button and Door Lock control is a part of Relay Door, which you colored in Green. The "2 wires of multicore cable" is a part of "Multicore cable: 4 core 28 AWG", which you colored in Green.
2. No Wiegand 26 bit or Wiegand 34 bit signal. We provide relay output, but NO time delay. The relay output specification has been provided in previous email and the diagram. It is a SPST relay, N.O. (normal open), rating: 5A at 12VAC or 24VAC. The connection is also provided in the diagram, the 2 relay output terminals simply is connected to Door Release Button input terminal of Door Lock Control system. The RFID SPST relay actually is connected in parallel with door release button.
3. Refer to previous email "..............a nice looking release button is fine.", my understanding...release button and Breakglass should be kept, no need RFID inside. If I am wrong please correct me