Your specific lizard example might not be relevant in this case, but the anoles that started that population would be an example, and there are quite a few other observations of Brown Anoles in random greenhouses or plant stores that got there like this.
The consensus on those seems to be that they should be considered “legitimate” wild observations:
Escaped pets with no established population
Options for the best way to handle non-established obs (e.g. escaped/released pets)
There’s this observation field for them: Observation field: Escapee/Non-established