A coordination platform could help people request company for a visit or a planned activity. It needs a clear service model, including who provides support and how suitability and availability are confirmed.
Users should be able to state practical preferences without publishing sensitive personal information. A request, proposed match and accepted arrangement need distinct statuses. Organisers need visibility of cancellations and unfulfilled requests, with an agreed fallback contact process.
Start with one organisation and a small set of activities. Test a participant changing plans and a companion becoming unavailable. The platform can help organise human contact, but it should not promise that every request will be fulfilled or imply that a profile alone establishes someone is appropriate to support another person.
Related reading: Mobile App Accessibility: Make Your App Easier to Use.