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Also, the deployment shows nothing under Parameters, but then I click on *Edit*  and I can see them

hi <@U03BETVGKT3> - can you share what your flow's signature looks like? i cannot reproduce this thus far

```» ipython

#[1]
from prefect import flow

#[2]
@flow
def foo(x: int, y: str, z: bool = False): ...

#[3]
foo.parameters
Out[3]: ParameterSchema(title='Parameters', type='object', properties={'x': {'position': 0, 'title': 'x', 'type': 'integer'}, 'y': {'position': 1, 'title': 'y', 'type': 'string'}, 'z': {'default': False, 'position': 2, 'title': 'z', 'type': 'boolean'}}, required=['x', 'y'], definitions={})

#[4]
import inspect

#[5]
inspect.signature(foo)
Out[5]: &lt;Signature (x: int, y: str, z: bool = False)&gt;```

my initial guess was that there might be something about your flow's parameters themselves that the UI is having a hard time with