Apple’s VideoToolbox API (the equivalent of DXVA on Windows for providing direct access to the GPU encoder) is kind of bad, you can use https://www.voukoder.org/ to get direct access to ffmpeg’s GPU encoders if you’re using Premiere on Windows but in general most commercial NLEs don’t have great support for GPU encoding because CPU encoders can generally produce slightly higher quality per bitrate (nvenc has only very recently gotten close to parity with x264 and x265 and it still doesn’t autotune as well so you need to know what you’re doing) unless you need realtime encoding/decoding with minimal CPU impact, which is not a common use case for video production
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