Multiple CC/CV charge controllers in parallel?
You misunderstood the purpose of this controller IC.
This is just the sensor to an opto coupled LED input to a flyback primary driver that can draw up to 100mA while the flyback supply charges the battery. So you can charge at any current you want and when the LED turns on, the driver is cutoff.  Choose Isense according to limit.
However there is no cutoff after CV drops below 5% to 10% of CC level which is necessary for Lithium batteries.