Converting an Esri GDB to GPKG using PyQGIS

I have been working on putting together a simple script that converts a file geodatabase to a geopackage. I have a geopackage with empty tables set up so that the data in the gdb can be appended to easily. I have tried different approaches and want to keep the code simple. I cannot for the life of me figure out how to make this work though.

Does anyone have any thoughts about what I am doing wrong? Basically, I am trying to iterate through every featureclass in a GDB and export it/append it to a gpkg.

outputGpkg = r"D:export.gpkg"
inputGdb = r"D:import.gdb"
fileEncoding = "UTF-8"

gdbFcs = [ "Feature1", "Feature2", "FeatureN" ] # eventually I want to find a routine to pull fc names from gdb and populate the array

for fc in gdbFcs:
    gdbLyr = QgsVectorLayer(inputGdb + "|layername=" + fc, fc, "ogr")
    print(gdbLyr)
    #if gdbLyr.type() == QgsMapLayer.VectorLayer:
    #    _writer = QgsVectorFileWriter.writeAsVectorFormat(gdbLyr, outputGpkg, fileEncoding, gdbLyr.crs())
    _writer = QgsVectorFileWriter.writeAsVectorFormat(gdbLyr, outputGpkg, fileEncoding, gdbLyr.crs())

from osgeo import ogr

fgdb = r"C:GISdatasomefilegeodatabase.gdb"
outdb = r"C:GISdatatestdataOK.gpkg" #Has to be created in advance
fileEncoding = "UTF-8"

driver = ogr.GetDriverByName("OpenFileGDB")
data = driver.Open(fgdb, 0)

#List all layers in the file geodatabase
feature_class_list = []
for i in data:
    foo = i.GetName()
    feature_class_list.append(foo)
    
#Write to geopackage
for fc in feature_class_list:
    gdbLyr = QgsVectorLayer("{0}|layername={1}".format(fgdb, fc), fc, "ogr")
    print('Writing: ', fc)
    options = QgsVectorFileWriter.SaveVectorOptions()
    options.driverName = "GPKG"
    options.layerName = fc
    options.actionOnExistingFile = QgsVectorFileWriter.CreateOrOverwriteLayer
    options.EditionCapability = 0 #CanAddNewLayer 
    QgsVectorFileWriter.writeAsVectorFormat(gdbLyr, outdb, options)

gdbPath = r"E:ESRI_data.gdb"
gpkgPath = r"E:My_GeoPackage.gpkg"
gdbLayer = QgsVectorLayer(gdbPath,"targ ESRI GeoDatabase","ogr")
subLayers = gdbLayer.dataProvider().subLayers()
for subLayer in subLayers:
    parts = subLayer.split('!!::!!')
    layerName = parts[1]
    geotype = parts[2]
    lpath = r"{}|layername={}".format(gdbPath,layerName)
    olayer = QgsVectorLayer(lpath, layerName, "ogr")
    # set options
    options = QgsVectorFileWriter.SaveVectorOptions()
    options.actionOnExistingFile = QgsVectorFileWriter.CreateOrOverwriteLayer
    options.layerName = layerName
    _writer = QgsVectorFileWriter.writeAsVectorFormat(olayer, gpkgPath, options)
    if _writer:
        print(layerName, _writer)