@JoergS5 hmm .. ok. Does that mean fusion 360 does not have this option to calculate the RTCP and output gcode ?! I do have the Fusion360 "machining extension" for multi-axis machining activated.
For 4-axis, the calculation is not so complicated: Rcos, Rsin will do I think. Hope this should be available in Fusion360 machining extension! My eventual plan is to rotate the job for A-xis and tilt the head for B-axis, to get a full 5-axis machining capability.

@xyzdims Got any answers to this "inverse kinematics" query ? I have a similar situation, for which Iam trying to get fusion to work:

4 axis machining with tilting milling head
I want to do 4-axis machining.
But I have a tilting milling head ( not a rotary table).
My tool tip is 100mm away from the pivot axis of the tilt head.
So I believe some forward/inverse kinematics has to be done to get the XY position of the pivot point, given the tool tip point.
( some basic Rcos(theta), Rsin(theta) calculation etc. for 4-axis )

Will fusion do this automatically and output gcode ?
How to achieve this ?

I tried giving : offset:[100,0,0] in :
var aAxis = createAxis({coordinate:0, table:false, axis:[1, 0, 0],offset:[100,0,0], cyclic:true, preference:0});
machineConfiguration = new MachineConfiguration(aAxis);

setMachineConfiguration(machineConfiguration);
optimizeMachineAngles2(1); // map tip mode

But this is simply doing a "translational offset " in X axis !

Is there any other setting I need to do for this ?