The Flipper Zero is not certainly the problem here, and it is not a proper SDR tool as said. But I believe it's technically interesting that the Flipper Zero uses the CC1101 inside the Flipper in a more powerful way. The chip can be configured to just report in a given pin the actual OOK/FSK state (logic high/low). The same can be done while transmitting. So the Flipper is not limited to the protocols/formats supported by the CC1101 during normal operations, but can do any protocol as long as it is within the frequency range and uses OOK or FSK modulation (or the FSK variants supported).