I mean I expected him to avoid talking about how he's never going to deliver on that promise, but I didn't expect it to disappear this conspicuously. I think hating on BLM and doing performative Blue Lives shit has replaced it as the symbolic representation of white supremacy in his campaign.
It hasn't disappeared. He's actively campaigning on the wall as a success. I think it was the last debate I heard him claim something like 400 miles of wall have been built.
I expect that's a wild rounding up but honestly I didn't care enough to check how much he actually built.