Hi, I have a fender GT40 amp that shows up in qjackctl patchbay. Also a Mustang 1 V1 shows up.
Both sound great. No reason an LT wouldn't work, as all are designed for Mac usb standards shared by linux.
As a bonus, you can use such amps routed in qjackctl as glorified pedalboards with whatever
linux effects you use, Rakarrack, Guitarix, or a daw with hosted lv2/vst/vst3 effects. At that point,
you've entered sonic heaven.
There is an android app amp editor for many older Fender amps called Remuda, it has a free version
for testing, and the paid version at the app store is only $6.99. Don't know if an LT would be supported.
But it get's great reviews with Mustangs like a III V2, a great amp which is widely available 2nd-hand.
There is a linux editor for the Version 1 series of Fender Mustang amps, (I, II, III IV and V,) called Mustang Plug.
It might now require an older linux distro, for some old dependencies. Fender moronically failed to loan the dev
a V2 mustang, so the trail ended.
The current Fender windows editor for the LT might run in a new wine-staging. The gui works,
but I have no LT for confirming connectivity.
A second-hand GT40 runs around $200 in shops, likely less in the wilds, has 115 preset slots,
and with the latest firmware update, is sonically the equal of their more expensive GTX series.
It has a nice screen and editing capabilities are easy to follow. It has a wide range of presets,
and I use some of the default models as the amp for linux fx, and vst plugin chains.
A few dozen factory presets are perhaps 'over-the-top', but show the extremes
available to madmen across the waters And are easy to tame or replace.
If buying new from a shop, make sure you verify the returns policy, and if they will
do a firmware update for you, if desired. etc
Cheers