Hi Vladimir 
Personally, I wouldn’t rely on AI for consistent, structured data tasks like this.
While Asana AI is great at surfacing information or spotting patterns, it still struggles with precision and consistency, which is critical when you need to monitor milestones or task statuses across many projects.
For now, I’d recommend sticking to Asana’s native Portfolio features:
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Use the Portfolio view to list your 35 projects (remark: you can configure project template to automaticall add the created projects to a specific portfolio)
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Add a “Milestones” column (built-in) to surface progress at a glance (see screenshot below)
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(If relevant) Use Rollup Fields to automatically display the total of specific custom fields (see screenshot below)
Examples
Milestone progress showing the milestone, their date and completion status
Rollup field surfacing custom field data from the project milestones tasks - total
Resources
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Portfolios Overview ( Asana Help Center )
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Milestones and how to create them Asana Help Center
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Roll-up Fields in Asana Portfolios (Forum)
Hope that helps, feel free to react or ask questions 
Arthur