This hasn't been my experience. Chinese battery tech become much better in the recent years. I've replaced battery in my Pixel 3 with an 8$ knock-off from AliExpress with good reviews and it's performing just as original, both subjectively and by AccuBattery metrics.
>>reisse+(OP)
Same for me, I paid someone to replace my Pixel 3 battery for $40 and have had nothing but a positive experience. It saved me ~$400 on a new phone, I'd gladly do it again.