Here are the links I used, I will also suggest to find the manual of your FRS radio.
https://www.k0tfu.org/reference/frs-gmrs-privacy-codes-demystified.html
https://www.buytwowayradios.com/blog/2022/11/chart-of-standard-dcs-codes.html
I used channel 7, the same channel they use with the Walkies at work, for the Tone Mode using Chirp, I had to use Cross, DTCS 143 MN DTCS- > It programmed that when I typed in the DTCS.