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I would absolutely be surprised if they did that. Apple does not seem interested in this line of apps, and its quite a lot to go from glorified paint to a Figma competitor. There's just not much precedent for Apple caring about building out apps for 'pro' work - Final Cut and Logic Pro as historical anomalies.
It could be more like freeform is Garageband to Logic. So a Design Pro app could be something in the future... They do seem to continue investing in Final Cut and Logic.
I’ve used Sketch, Figma, Adobe XD, InVision and am generally unimpressed with these as prototyping tools. They overemphasize pixel perfect screen design & under solve the most important UX task: documenting the end-to-end workflow through a user task. My favorite prototyping tool was App Cooker, a workflow-focused app for iPad that sadly got acquired and discontinued. There’s a ton of room for innovation in the design space.