Could those things lead to genocide? Yes, absolutely. But It depends completely on the scale of such activities. It’s not clear to me that this is the case here. The most recent census data shows Uighur population growth continues in China.
Now, as you correctly pointed out, genocide can also occur when a part of an ethnic group is being exterminated. Is there some definable part of the population that is being more severely affected, such that their extermination seems imminently possible? Is there some town or region where the violence, sterilization, etc. is much more severe? I have not heard such a claim but I’m open to it.
But my broader point is this: Is it genocide apologia to acknowledge the events that are happening, condemn them, but question whether they meet the definition? That seems like a stretch. This is a semantic discussion, not a moral one. But this question of what is or isn’t a genocide has become a litmus test for whether you belong to the good tribe or the bad one, so people react so emotionally that it’s hard to have this conversation. And, I think the looseness with which we use this word opens up its use in situations that it clearly shouldn’t be, like allegations of white or Christian genocide in the US.