Yes, it can help! The use of POCUS lung ultrasound is a useful method both in diagnosis and in real-time monitoring of the COVID-19 patient.
In addition, we could monitor the patient not only in the emergency department (ED) or intensive care unit (ICU), but also in a pre-hospital setting, such as in the home of a patient who is in quarantine.
In fact, POCUS lung ultrasounds not only allows one to anticipate further complications such as lung consolidation from bacterial superinfection or pneumothorax, but it also allows detection of viral pneumonia at the early stages. Furthermore, the use of a high-frequency ultrasound probe, which is an adoption of the 12-lung areas method  and the portable ultrasound (they are easily decontaminated), allow this method to be repeatable, inexpensive, easy to transport, and radiation-free.
There are no known pathognomonic patterns of COVID-19.
The early stages COVID-19 pneumonia results in peripheral alveolar damage including alveolar edema and a proteinaceous exudate . This interstitial syndrome can be observed via ultrasound by the presence of scattered B lines in a single intercostal space (see videos below).
Subsequently, COVID-19 pneumonia progression leads to what’s called “white lung”, which ultrasound represents as converging B lines that cover the entire area of the intercostal space; they start from the pleura to end at the bottom of the screen.
Finally, the later stages of this viral pneumonia lead to “dry lung”, which consists of a pattern of small consolidations (< 1 cm) and subpleural nodules. Unlike bacterial foci of infection, these consolidations do not create a Doppler signal within the lesions. We should consider the development from “white lung” to “dry lung” as an unfavorable evolution of the disease.