iPhone 12 Battery is available

Yes — as of 2025, Apple still provides official battery replacements for the iPhone 12.

Apple typically supports battery replacements for 7 years after a product’s launch.

iPhone 12 was launched in October 2020, so battery replacements will remain available until at least 2027–2028.

Please read the following article then post back with your question –

Writing an effective Apple Support Communities question - Apple Community