There are quite a few. Pinterest, LinkedIn, Plaid, Mercari, and Rakuten shared their experiences with TiDB at PingCAP's annual event last year (2024) - https://www.pingcap.com/htap-summit/.

In the previous event (2023) there were speakers from Airbnb, Databricks, Flipkart, PayPay, and others sharing their experiences as well - https://www.pingcap.com/htap-summit/sept-2023/

Disclosure: Employee of PingCAP the company behind TiDB