Sensors have been touted as a possible fix for Tattoo issues with Smart Watches for a little while, not sure the Random Twitter user is a sage.
The evidence (as far as has been covered) would suggest that this is not full proof though may well help many , a look at various options in this article but none pf them likely to be 100% effective.https://www.theverge.com/23567992/wearable-tech-tattoos-fitness-tracking-how-to
Cannot test myself though as do not have tattoos.
I do not work for Samsung or make Samsung Products but provide independent advice and valuable contributions.
My Device- S21 Ultra 5G ( SM-998B/DS ) CSC= BTU , 12GB/256GB
One Ui 5.0,Android 13 .
Do you have to remove the sticker to charge it?
A Samsung tech just lied to me about this problem then immediately reversed the answer and directly confirmed that tattoos are an issue.