On Lithuanian news are continuous updates, that also explain why this is technically a complex operation - they are now draining a part of the swamp to retrieve the sunken vehicle.
There is also a good explanation on the environment, which explains why people unfamiliar with it could be lost.
https://www.lrt.lt/en/news-in-english/19/2522536/missing-us-troops-in-pabrade-works-underway-to-pull-military-vehicle-from-swamp
Also the US ambassador to Lithuania is talking nicely (for now):
"United States Ambassador to Lithuania Kara McDonald says Lithuania is an exemplary ally in the search for the US soldiers missing at the Pabradė training ground.
The operation will continue until the soldiers are found, she said.
“As our secretary of defense has said, we will not rest until our troops are found. You can see that it is technically a very different recovery situation,” the ambassador said.
“I want to thank the Lithuanian government, the authorities and all that are out here helping in the recovery, their support has been absolutely vital and essential to this, Lithuania is a model ally and we are so grateful for their help, thank you.”
McDonald said she arrived at the training area on Thursday “in a show of support and solidarity to the families of our four missing soldiers and to the troops and units that are working so hard in the recovery”."