Who is this RTO really going to apply to anyway? Are we all getting heartburn over nothing? I have been at SAP for more than 20 years and I have yet to see any policy which was even 25% adhered to.
Let's see.......We had travel restrictions and then I called the kalipeh and was told all of the rooms are fully booked - no vacancies ( really?). We have had hiring freezes and then immediately comes exceptions right away a from L1 managers and new people are hired or teams just go and hire a bunch of Cusers for very extended periods (Really?).
I could go on and on, but I think everybody who has been here for a while knows what I am talking about. SAP has had very little rules by which we have had to work by - everybody has always been able to freelance how they want to work.
This RTO will be the same as all the policies before, it will all come down to your individual manager and how they will or will not enforce this ( assuming that your manager is even co-located in your same office, which for many people is not even the case). Even moreover I suspect that many Managers will themselves want to continue working from home and so what is good for them will also be good for the team.
SAP has no way of independently monitoring who is in the office and who is not, so if you get along well with your manager, this will not be an issue. Only those people who have managers who for whatever reason want to enforce this will be subject to RTO - and these folks will probably be looking for another team to get onto ASAP.
My advice is to relax and consider all of the other attempts to drill some type of policy into the organization which have completely failed - and this one will also go the same way.