I have EU blue card from last 2 years and I’m working for a company in Germany. During covid my company allowed to work fully remote and I came to my home country in Asia and working remotely from here (paying taxes in Germany). Its been 5 months now, should I have to go back to Germany now? Would it affect my re-entry in Germany?
Periods upto 6 months outside of Germany are generally allowed without any side effects on the Residence permit.
A BlueCard is an exception to this rule, where 12 months is allowed.
For any longer periods, an application must be made before you leave.
A foreign assignment (Auslandseinsatz) for a German firm outside of Germany is generally considered a valid reason for a longer absence.
So if you are planning to return (i.e. take up residence again), you should do so before the 12 months are up.