Update, change power - volume button and it works. Yeah the previous one the rubber disintegrated liao.
Easy to do, hardest part is putting in the new button and moi had to use scotch tape to hold it so can close the phone casing. Super easy, it's only 2 t3 screw at the bottom, remove sim card slot and moi use credit card to open the screen - casing (careful not to rip the fingerprint cable as the 4 edges a bit hard to open using CC).
Lazada got voucher so moi paid $0.60 for the button and the extra optional sensor, shipping is $2 though. Wanted to change the battery but cannot find non sus ones on shopee or lazada. Alixpress shipping quite ex too. For battery imo go mistermobile pay $38 can liao.