Export settings for exporting 24MP size photos with full resolution? Lost my original settings when old pc failed.

I have a Windows pc with LRC installed. What should my settings be in the export dialog in order to export 24MP photos at full resolution. At present, images exported are no longer shown at full resolution or size, after switching to a new pc? Also, images exported with JpegXL selected do not export correctly. The Microsoft Store has tried to sell me a download for the problem - does Adobe have a fix?