Every bank offers digital banking as their primary way of reaching and offering services to their customers so it's hard to differentiate banks with offices and not but usually we shouldn't trust a random new bank with any amount, just go with the most reputed banks whether it's government or private entity as long as it's doing its job and a little more in the interest won't make any difference.
All banks certainly want to be able to provide their existing customers or filter out new ones with better facilities and innovation, including digitalization, which ultimately provides convenience for their customers. If you are in doubt about a bank, it to need be registered with the government or have obtained an operating permit. Of course, it can easily be detected if you want to look for information first before you want to become a customer.
Don't be tempted by the promise of prizes and high interest rates and other advantages, but they are not registered with the government.