How send RF 433MHz fixed code to cloning it to new remote control?

[lumanga]

Dear Sirs,
I have used an ARDUINO nano with RC Switch library and also an ESP32-C3 with TASMOTA firmware with the RF module "MX-RM-5V," to capture the 433MHz fixed-code signal from a gate-opening remote control is captured as:

{"Data":"0x637","Bits":12,"Protocol":8,"Pulse":330}

If I send the same RF code, using the "FS1000A" RF send module, the gate works, confirming that the code is correct.

When using the original remote control to transmit the code for duplication onto a new remote, the new remote successfully captures and stores the code, and it functions properly.

However, even if I repeatedly transmit the code using Arduino and the "FS1000A" RF send module with the RC Switch library, or via ESP32 and TASMOTA, the new remote does not capture or register the code.

Why is this happening? Why the same code send from the remote control is captured to cloning and the signal from the Arduino module "FS1000A" not?

[kmin]

@lumanga

However, even if I repeatedly transmit the code

Most likely there is pause between repeated signals.
Experiment with some delays like 5ms between repeats.

Ideally try to catch the pause length from the original remote.