Ichimoku - cloud: How to fill the space between two line series?

[UweR70]

Imagine two line series A and B.
How to fill the space between these two lines?

Please notice that in my case the two line series are part of the calculated Ichimoku data.
Means one array item contains all needed data, like for example for "array item # 47":

result.indicatorResult[47].time = 1682920800
result.indicatorResult[47].senkouSpanA = 0.07447
result.indicatorResult[47].senkouSpanB = 0.07386
result.indicatorResult[47]. ...

I believe the important code part should look like this NOT working code:

const dataCloudGreen = result
.indicatorResult
.filter(item =>
item.senkouSpanA != null
&& item.senkouSpanB != null
&& item.senkouSpanA > item.senkouSpanB)
.map(item => {
return {
time: item.time,
value: item.senkouSpanA,
low: item.senkouSpanB,
};
});

It does not work because there is no "low", nor "value2" property.
Also this does NOT work:

return {
time: item.time,
value: {
high: item.senkouSpanA,
low: item.senkouSpanB,
}
};

Any ideas?

[UweR70]

So now answer ... i´ve developed it ... and found some issues in Binance:

my solution

chart start:

chart end: (BTW: my ichimoku implementation contains the correct number of data points in the future - means 26 and not 25 or something else - and of course it can be configured completely dynamically)

[UweR70]

The current state:
Implemented both: Cloud handling on client as also server side.

[difof]

Can you elaborate on how you filled the area?