Hi @barrybevel
These core-js warnings are related to the fact that we attach polyfills to the ES/CJS files (e.g., https://cdn.jsdelivr.net/npm/handsontable@8.3.2/dataMap.js and https://cdn.jsdelivr.net/npm/handsontable@8.3.2/dataMap.mjs) that you import to the Angular project along with wrapper.
Angular has its own polyfills configuration. And warnings point that using polyfills in Handsontable code is unnecessary and might duplicate some of the polyfills in the building process.
Ideally would be to have a pure build of Handsontable core-js-free - although it would also affect non-angular users.