promise is not executing for executesql on Ionic-native sqlite object - ios

Question

The promise on executesql on Ionic-native sqlite object is not working in NodeJS 16.
this.getTransactionDbConnection().executeSql(OfflineService.SQL_GET_METADATA, [key])
.then((data)
If I divide above call into 2 parts like below , then I am able to see both console statements
console.log(transDb); let sqlResponse =
transDb.executeSql(OfflineService.SQL_GET_METADATA, [key]);
console.log(sqlResponse); sqlResponse.then(data)``` --------- This line is not responding.
I do understand, I need to put async await and check.
But Observer will fail. That will be then a bigger change.
Same code works on NodeJS 12.
In package.json dependencies, I am using
Ionic-native/sqlite : ^4.7.0,
cordova-sqlite-storage : ^2.5.0
My complete code -
getMetadata(key: string): Observable<string> {
return Observable.create((observer: Observer<string>) => {
this.getTransactionDbConnection().executeSql(OfflineService.SQL_GET_METADATA, [key])
.then((data) => {
console.log('After executesql',JSON.stringify(data));
const metadataValue = data.rows.length > 0 ? data.rows.item(0).VALUE : '';
console.log('Get metadata.', key, metadataValue);
observer.next(metadataValue);
observer.complete();
}).catch(e => {
console.error('Error occurred while trying to get metadata.', e.message);
observer.error(e);
});
});
}