I’m not an expert on this, so take what I’m saying with a grain of salt. RISC-V processors definitely don’t have Intel ME. However, as the RISC-V architecture is open source, some manufacturers could include their own similar coprocessor. Also, AMD doesn’t have anything called ME. Do you mean the PSP (Platform Security Processor), which provides a similar function to the Management Engine?
That’s not really possible. With such a wide-ranging standard as USB-C, the cable needs to report what it can support. Without E-marker chips, for example, there would be three possible results: no cable can charge quickly, every cable is thick, short, and expensive, or cables catch on fire frequently. Cheap cables that don’t support all of the extra features are just cables, but the good ones need to let the computer know what they are capable of.