I've read all the interview experiences of Microsoft for SDE-1/SDE-2 role which were posted on LeetCode in the past 6-months. Following is the compilation of all the design questions being asked:

1. Tiny URL
2. Google Docs
3. Twitter
4. LeetCode
5. API Rate Limiter
6. BookMyShow
7. Chat Application
8. E-Commerce Portal
9. Splitwise
10. Vending Machine
11. Google Autosuggest
12. Uber
13. Parking Lot
14. Stock Exchange
15. Logging System
16. Authentication Service

Tiny URL, Parking Lot and BookMyShow were asked the most number of times :)
For compilation of programming questions of Microsoft (last 6 months, SDE-1/SDE-II role), you can refer :: https://leetcode.com/discuss/interview-question/1726122/Compilation-or-Microsoft-Interview-Experience-Question-or-SDE-ISDE-II