This isn't meant to be a shopping site, but AP7370 and TPS7A25 should do what you want.

In very low duty cycle applications, it's common to use an LDO instead of a buck regulator. You can also use both in parallel, turning on the buck when you need more current.

See https://www.ti.com/lit/ug/tiduaa4/tiduaa4.pdf?ts=1594248755506&ref_url=https%253A%252F%252Fwww.google.com%252F

This isn't meant to be a shopping site, but AP7370 and TPS7A25 should do what you want.

In very low duty cycle applications, it's common to use an LDO instead of a buck regulator. You can also use both in parallel, turning on the buck when you need more current.

See here for more info on LDO+buck