If you need to implement it in v10, I would go back to using the plugin but you can simply paste the logic from the plugin into your application as an extension
Demo: https://stackblitz.com/edit/highcharts- ... mponent.ts
Unfortunately, you need to have 2 separate series, because as I said, this logic doesn't let you to control radius of a singular point (so that we have different radiuses for different points in one series) but only control the radius of each series. The question is why do you need only one series? You can always name them exactly the same, then link them
and color them the same way as I did in the demo, and there shouldn't be much difference when it is 2 series or just 1. If you face any difficulties, please let me know and I will try to help you figure out the problem.
Feel free to ask any further questions!