Hi @kodakawa,
As I commented, the only way to assess what damage has occurred, if any, is to open the phone and check.
Here’s a link to a [https://www.youtube.com/watch?v=MLusxOJ4j4A|video] that shows how to replace the battery in the phone.
It is useful as it shows how to open the phone so that it can be checked.
Also if the battery is damaged you’re halfway there to replacing it.
Replacement batteries are available online. Just search for ''Xiamio Pocophone F1 battery'' to get results for suppliers.
If it worries you, don’t use the phone or charge it until it has been checked.
If opening the phone seems too daunting a task contact a reputable professional mobile phone repair service and ask for a quote.