Do note that this is not an apartment building (atleast not entirely). The ground floor corner part of the building has an Inglott store.

via StreetComplete 60.2

There is a roundabout nowadays - satellite imagery not yet updated

Unable to answer "Is there a shelter at this stop?" – Il-Mosta - MCAST Mosta (Bus Stop) – node/5044658175 via StreetComplete 60.2:

Bus stop not seen. Please confirm.

Verify this ferry route exists.

I can't locate information about an existing "St Paul’s Bay" to "Sliema" ferry on the web.

For way: way/591132569

One reference I see[1] seems indeterminate if it will exist in the future, "hopes to potentially extend ferry services from Valletta, Sliema and Mġarr in Gozo to St Paul’s Bay.". Another reference[2] indicates a route will start in Aug 2025.

[1] https://timesofmalta.com/article/bugibba-breakwater-project-70-complete.1096551
[2] https://timesofmalta.com/article/watch-gozobugibbasliema-ferry-launch-end-august-transport-minister.1112423

The road from the point I have indicated to the main road Tul Il-Kosta is know n locally and sign posted as Telgha Tal-Madelina, this leads onto the 118 signposted as Triq il-Madelina