I have some good news for you. I looked at Erel's code in B4XSearchTemplate class module and MaxNumberOfItemsToShow is public, so you can change it in your application without having to modify the XUI Views library. All you need to do is add a line like this in your app:
SearchTemplate.MaxNumberOfItemsToShow = 1000
Note I made it 1000, but you can put something else. But also remember that the higher you make the number, the slower the list loads up. I would not make it much more than that. You can still of course find your items at the bottom of the list by typing more characters to drill down on the items. I do not see a need for you and do not recommend for you to load all 10000 records you say you have in your list.