Set spawned collision component to static?

When using the node shown below in the construction script (so it’s on design-time), it’s mobility by default is set to moveable. But I want them static (better performance I assume). But there is no node to set their mobility at design-time?

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89955-bp2.png

I checked but SetMobility does not exist. Bug?

Does the mobility of a shape-component even matter for performance?