setAlias doesn't work on geopackage

Question

I'm trying to add multiple fields to a geopackage layer and set their aliases at the same time. It is working on a temp layer but not on the geopackage, why?

lyr = iface.activeLayer()
p = lyr.dataProvider()
fl =    [['grtr_spr_t',QVariant.Int,'test'], #name, type, alias
        ['grtr_spr_g',QVariant.Int, 'test2'],
        ['grtr_spr_l',QVariant.Int, 'test3']]

fieldlist = [QgsField(f[0], f[1]) for f in fl] #Create a list of QgsFields

for e, data in enumerate(fl):
    fieldlist[e].setAlias(data[2]) #Set the aliases of them

#[f.alias() for f in fieldlist]
#['test', 'test2', 'test3'] #They are set

p.addAttributes(fieldlist)
lyr.updateFields()

Answer 1

I got it to work with:

layer = QgsProject.instance().mapLayersByName('startpunkt')[0]
p = layer.dataProvider()

fieldlist =     [["grtrsprt", "P", QVariant.Int],
                 ["grtrsprg", "S", QVariant.Int],
                 ["grtrsprl", "D", QVariant.Int],
                 ["grtrgrpt", "P", QVariant.Int],
                 ["grtrgrpg", "S", QVariant.Int],
                 ["grtrgrpl", "D", QVariant.Int]]

#Add the fields
newfieldlist = [QgsField(f[0], f[2]) for f in fieldlist]
p.addAttributes(faltlista)
layer.updateFields()

#Set the aliases
fieldindexes = [[layer.fields().indexFromName(f[0]), f[1]] for f in fieldlist] #List of lists of field index and alias
[layer.setFieldAlias(i[0], i[1]) for i in fieldindexes]