I was curious about Komodo and TGS this year and it looks like I got my answer.
They are technically at TGS but they just don't have their own both.
At BitSummit they had a booth but they also lent some of the indie devs at the event some units to help show of their games, in exchange those indie devs had some small instruction booklets about the Steam Deck (thus not only promoting the game itself but also the Steam Deck as well).
Valve themselves have also been doing this, they did this last year at Game of the Devs from what I remember, we're a number of indie devs had Steam Deck to display their games, courtesy of Valve.
This is why they don't have a booth this year (other wise it likely would have been very similar to last year). One of the complaints does seem to be text size though, maybe some indie devs just didn't have enough time to adjust their text/UI size. I know that there are some games that will even have a unique text size in order to be easier to read on the Steam Deck.
One last thing, it seems that 10 hours ago their was a TGS main show, you had Harada from Bandai at this event along with others. From my understanding they did talk about PC gaming in addition to the Steam Deck. I could be wrong but it looks like the Steam Deck is an effort that Valve is putting in to also reach more of the Japanese market, but the biggest issue is price (which I highly doubt would get solved unless they some how plan to make a slimmer model that cost $100 less. If the base model cost ¥40,000 and if it went on sale for ¥37,000 at times then maybe it would truly sell like hot cakes. ¥53,800 is what the 64GB version sells for when it on sale.
Also Harada talked about the importance of community and that's one of the things that helps a game last a long time (and yet doesn't Tekken have some PS exclusive stuff?) So much for community.
PS I was writing this up before
Arc shared that image.