Alternative to digitalPulse for remote control sockets?

Using a logic analyser, the Pico pulse trains are 27.4ms long, pretty close to the 25 * 1.1ms = 27.5ms:

The Pixl.js pulse trains are 29.7ms long:

I used the remote control example code for both, just changing from A6 on the Pico to D13 on the Pixl.js, and modifying the pulse train sequences for my sockets.