OpenStreetMap Relations 2383845 + 2383846 are partially duplicates to complete admin boundaries level 8: 2381627. The way it is set up it is admin-level 8s within admin level 8 (see also https://osm.wno-edv-service.de/boundaries/ for Masku). Recommend to change them to admin-level 10 or remove.

Ferry access and ferries are completely missing. There is the inter-island ferry from Agios Efstratios to Mirina (Limnos)and the mainland connection to Lavrio (7.5hrs + 1.5hrs embarkation = duration 9 hrs) for access to Athens, that would be helpful to have for routing.
https://hellenicseaways.gr/en/routes/view/39 (Lavrio - Agios Efstratios - Misina Limnos)

Casalnuovo di Napoli is the only LAU2 / admin-level 8 municipality missing in Napoli (admin-level 6), Could someone (I don't know how to) kindly create it? ref (ISTAT, Eurostat) 63017
Surrounding municipalities Acerra, Afragola, Casoria, Pollena Trocchia, Pomigliano d'Arco, Sant' Anastasia and Volla.
Thank you very much!

There's a fixme on the airstrip. It's an unlicensed private airstrip, also according to the operator, the adjacent restaurant and their website at https://cortebariani.it/il-parco/
Sorry, not an editor, hope someone can adjust the info.

Ferry Lorient-Groix is a car ferry. But despite having times and vehicle yes it does not compute in OSRM. Can someone kindly look what "else" might be wrong?

Source i.e. (change date) http://www.compagnie-oceane.fr/reservation/?rub_code=77&letape=2&trajet=3_4_Lorient%20Groix&laDate=19/12/2016

Yenişarbademli. According to https://en.wikipedia.org/wiki/Yeni%C5%9Farbademli and https://biruni.tuik.gov.tr/medas/?kn=95&locale=en this should be a district relation, admin-level 6, such would need to be split from relation 1827196

OSM admin relations level 6 numbers 2865044 + 3826851 are duplicate. Recommend to merge 3826851 into 2865044.

osm.org/relation/2528207
According to Eurostat and national statistics office there are two administrative regions, Ilidža and Istočna Ilidža, which seem to be combined here?