Of course not. Just like what you can also see inside Indonesia, some people gets a heap of ordeal just to get their KTP or driving licence made, but some others can even let their brothers go and make it for them without even showing their face.
So it is also often the case that not every KBRI-staffs have the same level of knowledge, discipline and wisdom.
Some are flexible and some are unbending too.
In Germany you can't renew passport without attaching your visa or PR-card while applying, so..there is no way you can find adult indonesians secretly holding 2 nationalities here because if you already had german passport, you'd never be able to show a visa/PR card anymore.
However this rule is not the same anywhere else, that's why you can still find someone holding 2 passport aka having multinationality as an adult secretly in another country.
In Canada, during the pandemic the ambassador allowed the nearly expired passport to be extended 1 year longer (by issuing a statement which can be sent per-post, the one need it should just contact the embassy) so that indonesians no need to risk travel so far just for renewing passport.
It would have been great if this kind of policy is uniformly applied in all indonesian embassies...but apparently not every ambassadors we have has the same wisdom like indonesian ambassador in Canada.
Talking about skills and knowledge about recent particular rules and law... frankly speaking... people who have been active in diaspora communities like me are often more informed than those staffs.
KMILN and Dual nationality for mixed-children for example were also the result of the diaspora's efforts, not government's effort.
Talking about surname issues again...
I heard from indonesian students who came here purely to study normally got a legalised statement (probably even made by a notary) to use their father's name as a last name (if they only have one single word name), to be used as long as they reside abroad... or to use the last part of their name as a "surname", if their name consists of few words and would just use it all along their life abroad.
However if they don't marry with locals, it wouldn't cause as many complication as the mixed-marriage couple afterall. Because their civil status still stand under the same law afterall, they can still choose to do things relating to their civil status using indonesian law. So the surname thingy is simply for practical reason afterall.
But it's not the same with people like me who might have children who would follow their fatherland's law.
Can you imagine that I have already been living for 12 years here but my nama is still in my family's KK (household registry?
And you might never know this other absurdity either:
"If I move in Indonesia with my family... my husband can't even be put into my own household registry (KK), as long as he is still a foreigner and not a PR holder (KITAP holder). So I would be the head of the household and my kids all stay under me, but my husband is not part of my "household". How absurd is that?
Recently fortunately it wouldn't take too long anymore to get a KITAP for indonesian's spouse as long as the husband comes to indonesia using spouse's sponsor (which was also the painstaking effort and yearlongs fight of diasporas), at least the long term marriage can be a basis to get a family KITAP now.
However there is also a minus points here... if the husband comes to indonesia using spouse sponsor, it might be easier to obtain a KITAP but he's not allowed to work... so how can he feed his family?
KITAP requirements and hurdles for non spouse route are however more complicated.
It's not like me here .. I have the right to study and work just like locals as soon as I get my residency card, even I came with a spouse sponsor.