OSMNX - City Suburbs Polygons

I’d like to extract, given a city name, all suburbs and relative polygon geometries. For instance:
https://nominatim.articque.com/details.php?place_id=230259366

So, I run the code:

place = 'Torino, Italia'
tags = {'place':'suburb'}
gdf = ox.geometries_from_place(place, tags)

When reading gdf content, some suburbs have been stored as polygons (what I wanted), but some others have been stored as points. The one in the previous picture, for instance, belongs to the latter group.

unique_id                    node/6173683209
osmid                             6173683209
element_type                            node
geometry        POINT (7.6801517 45.0549503)
name                            San Salvario
place                                 suburb
reg_name                                 NaN
wikidata                                 NaN
wikipedia                                NaN
name:pms                                 NaN
nodes                                    NaN
ways                                     NaN
description                              NaN
type                                     NaN
Name: 14, dtype: object

While others, as already mentioned, are polygons, just like this one.

unique_id                                        relation/9169020
osmid                                                     9169020
element_type                                             relation
geometry        POLYGON ((7.6628873 45.068484, 7.663573 45.069...
name                                                       Centro
place                                                      suburb
reg_name                                                      NaN
wikidata                                                      NaN
wikipedia                                                     NaN
name:pms                                                      NaN
nodes           [[[13929743, 1669480276, 538902963], [53890296...
ways            [160600494, 572748521, 134148111, 111863124, 1...
description     Confini dell'ex Quartiere 1 della divisione a 23.
type                                                 multipolygon
Name: 41, dtype: object

How can I get all suburbs as Polygons?