The basic requirement to qualify for claiming unemployment benefits is that you are genuinely seeking employment. If you are not resident and seeking work even during the penalty period you can expect further sanctions. You are already on their radar.
If you submit the required paperwork at the right time and continue looking for work during the whole two months and document all your efforts they won’t know where you are unless they randomly call you in for a face to face interview at short notice.
If they call you, then you have to be available more or less immediately. You could do that quite well from a neighbouring country, but not, of course, from further afield.
The RAV advisor's job is to help you get off unemployment and back into the workforce as quickly as possible. As such, a part of their task is to identify anyone who looks like they're just trying to lean back into a free holiday, and to exert pressure on them (by raising the requirements and/or by deciding on penalty days).
Therefore, the decisions of RAV depend, to a very large degree, on the relationship the unemployed person builds up with their allocated RAV advisor. The more credibly you can demonstrate that you're putting in the time and making a significant effort for find work (besides sending out your minimum number of job applications, also a logbook of the networking you've tried, the time spent improving your skills in the fields in which you could work, your practice in and improvement of the local language, updated cv, newly collected references, etc.), the more you and your RAV advisor will be able to cooperate, and the more likely that the advisor will grant you the leniency you would need for a longer stay abroad.
There is also a small but real risk that they send you a letter saying come next week at this time. You RAV advisor is currently your boss and owner of your time so if you do decide to leave, get someone to check your mailbox.
I have no experience with RAV, but why not tell your advisor that you have a 2 week pre-book trip but you will be actively looking and applying online during that time? That way you've covered yourself and gotten confirmation on whether or not the the penalty days will be extended.
My wider experience of 15 years living here is that its a trust based system, but the moment you breach it you will become a target. I say that as a reformed dodgy Londoner.
Many moons ago when I has the joy's of being on the RAV, i was in a similar position. I had a 2 week holiday booked, leaving 6 week after my RAV registration date, and iirc it was actually a question on the form?
My berater just asked to see the booking, as she wanted to check that it was booked pre my notice period from my employer. It was, she was happy for me to go, and not do any reporting, but I would not be paid the days as I had not accrrued any holiday, or, she said to cancel it and try to claim the money lost from my travel insurance.
So it is possible, but if you are just going to take a break whilst you are on your existing penalty day that was not pre booked, I think you may find they won't be happy and your penalty period extended.