How can to change battery

Yikes, yes, if your battery is bloated then you need to replace it ASAP. Sorry to say, iFixit is a little light on Xiaomi guides, but over at the Spanish site Nadie Me Llama Gallina they have just what you need.

Manuales / Xiaomi Redmi 10 (2022) / Batería - Nadie Me Llama Gallina

Their guides are, as you might guess, written in Spanish but they do have an English language option.

Unfortunately, the Nadie Me Llama Gallina site appears to have been taken over and taken down, so the previous link to their repair guide is no longer usable.