Private sellers would not normally need variations as unlikely to have “several” to sell, so depending on what you propose selling you may need to register as a business seller.
However read this https://www.ebay.co.uk/help/selling/listings/creating-managing-listings/multiquantity-listings-listi...
Looking at your listings you do list a number of new items, so slso read this which was in the recent announcement, is it worth having your selling restricted.
More steps to address false private sellers
At eBay, we are dedicated to ensuring a fair and equitable marketplace for all business sellers. To achieve this, we monitor trading activities, and we’ll continuously help business sellers using a private account to transition to a business account, or restrict selling activity as necessary. In addition, we’ve reduced the number of free listings available to private sellers.
