For the top, option Support Top Distance this is two layer heights, so 0.4 mm in this example.

If you have a layer height of 0.2 mm, the Support Bottom Distance is also 0.2 mm.

the default Cura setting for Support Bottom Distance (which is a sub-setting of Support Z Distance) is the layer thickness specified in Layer Height. Most of the used slicers have an option to determine how much distance (in terms of layers) you want between your support and your product, you could add an extra layer as space to try out if that works better for you. If this fails to produce easy removable supports, you can resort to changing the support distance between the support and the print object. for high temperature filament materials that cannot take too much cooling as that would result in less structural solid prints), there is an option in Cura to override the fan speed for the first layer above the support ( Fan Speed Override).

If temperature and cooling cannot be balanced to prevent fused support structures (e.g. Extra cooling, lower print temperature and support distance should be in balance to create easy to remove support structures with respect to an acceptable print object surface. If you are printing too hot with too less distance, the support just fuses to the print object.

Space print nylon grateful dead fabric