Hi
Can this LDF LTE6 share an off-set dish with a satellite LNB? eg get an double LNB bracket. I have a dish pointing in the right direction for another Mobile carrier (at the moment my installed connection is not getting the quality it needs for a good signal) ( ps found out that I’m getting fleeced by a mobile broadband provider uugh)
Probably no 
Or you refer to that LTE at moon from Nokia , more can be found here: https://www.nokia.com/about-us/news/releases/2020/10/19/nokia-selected-by-nasa-to-build-first-ever-cellular-network-on-the-moon/
Your Satellite TV is on the sky… and LTE is like 30-80m above the ground
LDFR have some 5° angle … You can do a line from your home to bts.. and other one to your TV and check it. Read https://startyourownisp.com/posts/guide-to-google-earth/
About hardware installation… yes. Some people have strabismus installation to receive signal from both satellite who are like horizontally to each other.
You can TRY Do a Photo Story here ! 
Depends on the dish and if you are able to position it as an offset feed (off axis) for a suitable sweet spot using the second LNB bracket. It’s worth trying. Btw, try focus on the upper LTE bands if you have an unobstructed line of sight to the base station antenna.
Do you plan to use two different operators the same time or just testing the new one?
Thanks for the responses.. found this https://www.instructables.com/Cell-Phone-WiFi-Signal-Booster-Antenna/ .. ultrahack .. but I’m potentially better off getting the other option from Microtik .. dish that looks like a spider.. forgot the model name.
Cheers
Or why not an “Octopus Tripod” where you attach LBN brackets for your dish antenna
It doesn’t really look like a spider but did you mean the LHG LTE6:
https://mikrotik.com/product/lhg_lte6_kit
Here is a link with all the Mikrotik LTE products:
https://mikrotik.com/products/group/lte-products
Btw, what do you reckon (approx) is the distance to the nearest base station antenna?