I'm quite new to Netsuite. So is it possible here using standard functionality (or free bundles/apps) to import bank statements (xml, csv) and automatically create (not reconcile!) related transactions (incoming/outgoing payments, bank charges) ?

2020.2 provides some of this functionality. I have admittedly not tested this myself, but seems promising

sounds promising but on other hand its very strange that such feature doesn't exist yet. I can't believe that these operations can be entered manually only.