Many projects scammed with this excuse but never cared to refund investors. I would say it was purpose and it's from scammers. I don't think how listing on exchange shouldn't be executed by someone that's living. There's different between business and outbreak of course I understand once someone's person is affected the person would be troumaticed but we all have CMO , advisors to carry on etc. Any project that used it as excuse is probably a scam.
Projects that make it as an excuse to stop the development of the project, postpone the listing, and so on under the pretext of a pandemic, I think is a project that is not confidential and does not have a strong strategy. Really serious projects should not choose to give up and leave, but look for the right solutions and strategies to attract stronger market interest. Even if they choose to stop, at least there is an option to return investors' funds, in fact it is very rare. Most run away and disappear, irresponsible.