UCLA accepts about 26% of transfer applications (~10x Stanford’s rate.)
That probably makes it a high match at best.
You might have a realistic shot at other public universities that have strong programs in both math and CS.
Go ahead and apply to schools on your list, but you also need some more realistic back-up.
Maybe Wisconsin, Minnesota, UI-UC, or UMd-CP, if out-of-state costs are not an issue.