That’s a good question. Maybe if the buyers include a payment for “goodwill” they will honour previous commitments to clients. If not, probably forget it. Most buyers of successful ongoing businesses pay an amount, often considerable, for Goodwill.
If it’s a distress sale, that signals that the business is not making money and the buyers will be loath to pay for an intangible like goodwill. They are just interested in the real estate.