There's road going through here, effectively forming a traffic island.

via StreetComplete 32.1

There' road here forming a connection.

via StreetComplete 32.1

There is a trail here. Created this path using Osmand when I went there.

via StreetComplete 45.1

Attached photo(s):
https://westnordost.de/p/105488.jpg

There's a trail here.

The "photo" is of a screenshot of a path I created on Osmand when I went to this place.

The path is missing a bit at the top connecting to the path above.

via StreetComplete 45.1

Attached photo(s):
https://westnordost.de/p/105487.jpg

There's a narrower trail here, at a lower elevation, that goes along the main one already on the map.

Path created using Osmand while at tje site. Doesn't connect very well, I believe due to GPS inaccuracy.

via StreetComplete 45.1

Attached photo(s):
https://westnordost.de/p/105489.jpg

Unable to answer "What is the weight limit here?" for osm.org/way/1003658960 via StreetComplete 32.1:

No vehicles are allowed to cross the bridge.
On the main road, before turning to Rua da Igreja/Rua da Ponte Romana, there's a 'Trânsito Proibido' or 'No Vehicles' prohibitory sign with a complementary sign below indicating "na ponte medieval".

Attached photo(s):
https://westnordost.de/p/103539.jpg