I love my axoloti’s, have two and a new AKSO on the way.
There is a 4op Fm patch example in the community help library so the sound possibility is there in Axoloti basic but there are much more resources available with Akso, so feasibly you could attach a sequencer there.
The thing with axoloti is that it is so open ended, so you may have to adapt an existing patch to your individual use case, or build what you want from the ground up using existing objects.
Even within your own setup you can have an entirely different patch from sample mangling to turing sequencer to FM or subtractive synth just by loading a new patch. And then how you choose to control that is up to you midi, hardware and that’s all before you’ve even considered coding…the problem is that you do have to put in that extra work, but it’s easy really and fun if you have the right mindset…