Set FID field name in a GPKG processing algorithm ouput

Question

I have a standalone pyqgis script that uses processing algorithms. The final output is a GPKG layer, and I want to define the name of the FID field (that by default is fid).

The relevant code is something like this:

import processing
processing.run("native:buffer", {
    "INPUT": "/data/input.gpkg|layername=input",
    "OUTPUT": "/data/output.gpkg",
    "DISTANCE": 10,
})

This generates an output.gpkg with a primary key called fid, but I want to use another name.

Using two steps, following the advice of this answer I can get the desired output:

import processing
from qgis.core import QgsProcessing
outputs = {}
outputs["buffer"] = processing.run(
    "native:buffer",
    {
        "INPUT": "/data/input.gpkg|layername=input",
        "OUTPUT": QgsProcessing.TEMPORARY_OUTPUT,,
        "DISTANCE": 10,
    },
)
outputs["savefeatures"] = processing.run(
    "native:savefeatures",
    {
        "INPUT": outputs["buffer"]["OUTPUT"],
        "OUTPUT": "/data/output.gpkg",
        "LAYER_OPTIONS": "FID=id;",
    },
)

But, it will be nice if there is a way to do it in just one step, something like:

`"OUTPUT": "/data/output.gpkg?FID=id"`

that does not work.