Is it feasible to add Swift code to the plugin?

[waci11]

i am not good at coding and English ，so i take a lot of time to figure out how to build plugin with oc.
but now storekit2 only supports Swift code , i have to know how to add swift code .
after add swift code , the plugin can be successfully builded with Xcode and the project can be successfully exported with Godot , but get error when building to the real device .
the error is :
ld: warning: Could not find or use auto-linked library 'swiftDarwin'
ld: warning: Could not find or use auto-linked library 'swiftCore'
ld: warning: Could not find or use auto-linked library 'swiftCoreGraphics'
ld: warning: Could not find or use auto-linked library 'swiftObjectiveC'
ld: warning: Could not find or use auto-linked library 'swiftDispatch'
ld: warning: Could not find or use auto-linked library 'swiftSwiftOnoneSupport'
ld: warning: Could not find or use auto-linked library 'swiftCompatibility51'
ld: warning: Could not find or use auto-linked library 'swiftCompatibilityDynamicReplacements'
ld: warning: Could not find or use auto-linked library 'swiftFoundation'
ld: warning: Could not find or use auto-linked library 'swiftCoreFoundation'
ld: warning: Could not find or use auto-linked library 'swiftCompatibility50'
ld: warning: Could not find or use auto-linked framework 'AVFAudio'
ld: warning: Could not find or use auto-linked framework 'Symbols'