Hi @kelwin17,
Thank you for getting in touch.
The import speed depends on the amount of data present in the CSV, like attributes, taxonomies, network speed, server performance, etc. An important factor that plays with the import speed is the server performance, and this can vary for each server.
Please make sure that you map only the required columns during import to improve speed. Also, please try increasing the import batch count value in the plugin settings and see if the speed has increased. By default, the import batch count value will be 10, please increase this value to 15 or 20 and try. I hope this is clear.
If there are image URLs in your file then the importer will have to download the images and then upload them on the site and this will take a considerable amount of time. If you have image URLs then please try unmapping it and check if that improves the speed.