Well, you do not seem bothered/deterrred by cost/finances for these devices.
XP-Pen and most Wacom tablets are either graphic drawing tablets that use NO built-in visual display or graphics display drawing tablets that have a built-in drawing display that work in conjunction with a regular, conventional laptop /desktop computer.
Those, like from XP-Pen, Huawei and other Wacom tablet competitors need a regular computer with these for these to work
In addition these types of drawing tablets need a stylus to work. They do not work with touch.
Wacom is the GOLD STANDARD and most expensive for all drawing tablets and their portable self contained touch/pen tablet devices.
Wacom’s Cintiq visual graphic display drawing tablets start at $800 for the smallest 13 inch display graphics drawing tablet and move all the way up to $3500 for a huge 32 inch drawing display.
https://www.wacom.com/en-us/products/pen-displays
Competitors to Wacom are cheaper.
Even Dell has gotten into the game with their 27 inch screen Dell Canvas graphic display drawing tablet.
https://www.dell.com/en-us/wohttps://www.microsoft.com/en-us/surface#PRO_6_PANEL
All of these need powerful computers for these graphics drawing tablets to work well.
So, you need to read the specs on minimum and maximum laptop/desktop computer requirements to use all of the above.
The above drawing tablet devices are not stand alone, mobile tablets like the iPad or Microsoft Surface Pro line of portable touch screen tablet computers with their own self contained software ( iOS or Windows mobile and/or full Windows )and power supplies and Google Android-based tablets, like the Samsung Galaxy Tab.
https://www.microsoft.com/en-us/surface#PRO_6_PANEL
https://www.samsung.com/us/search/searchMain?searchTerm=galaxy%20tab&listType=g&attempt=1&size=30&item_type=Tablets
Wacom has their own stand alone touch and pen-based portable drawing tablets, but like all of Wacom’s products, it is THE MOST EXPENSIVE OF THE LOT.
https://us-store.wacom.com/Catalog/pen-computers/mobilestudio-pro
The new 2018, 3rd gen, 11 and 12.9 inch iPad Pro are the Flagship Apple iPad that uses the new Apple Pencil 2 and has every premium iPad feature.
iPad Pro - Apple
Apple also, still sell its last generation 10.5 inch screen iPad Pro that uses the 1st gen, original Apple Pencil.
The older 10.5 inch screen iPad Pro is no slouch and has many of the same premium iPad Pro features, as well.
iPad Pro (10.5-inch) - Technical Specifications
https://www.apple.com/shop/buy-ipad/ipad-pro-10-5
There is also the much cheaper 2018, 6th gen 9.7 inch iPad Pro that uses the original 1st gen Apple Pencil.
iPad 9.7-inch - Apple
Apple Pencils and external covers/keyboard covers are an extra purchase.
If one of your requirements for a tablet computer are wireless Bluetooth mice, trackpads or trackballs, NO Apple iPad has EVER had native support for these input devices.
They are non-existant on an iPad.
So, if these input devices are important to you, then an iPad/iPad Pro may NOT be for you.
Microsoft mobile Surface products supoort Bluetooth mice, trackpads and its own creative Surface Dial.
So, you need to decide which direction you want to go.
Display graphic drawing tablets tied to a powerful computer
OR
Self contained mobile tablet computers with both touch and pen input that are extremely portable and flexible.
Good Luck to You!