when you take a vacation day on sprint planning and leave a note in team chat of how much work you can take on next sprint but it gets ignored and you get overloaded next sprint

fml

Does it matter? Then the plan is just bad.

Just let people know it’s too much for the sprint and you probably won’t be able to get everything done.

Prioritise the tasks. If you don’t know which ones are important, then ask the responsible people and get the important tasks first. It’s really not a big deal.