I think I'm with Floral on this one.
The problem with this is that it seems to be a "socially acceptable" form of self-harm which really should not be promoted, in any way, at the level of healthcare professionals.
There is no mention in the images from the OP any support to help these biological females to stop doing something which actively impacts on their ability to breathe nor acknowledgment that chest binding is damaging at all times, whether or not we are in the middle of a COVID-19 pandemic.
It reads like health advice on "safer footbinding" because of the risk of bacterial infections. It's an oxymoron.
The examples of self-harm or addiction mitigation strategies are different, as societally we don't tend to say that people who cut themselves or are alcoholic are doing so as part of expressing their "true stunningly brave self;" we name those other behaviours as harmful to the individuals involved in them while doing our best to help and not stigmatise people. Yet the narrative from the healthcare profession seems almost the opposite in the case of breast binding.
If you're going to adopt any sort of strategy to assist these females-who-identify-as-men-or-nonbinary, I think you have an obligation to say outright, without all the flowery euphemisms, that the whole practice is physically damaging - especially given its potential effect on the ability of one's lungs to ventilate, which directly impacts one's capacity to supply one's body with oxygen, a necessity for survival. Natal females who are engaged in this practice ought to be reassured that it's completely okay just to STOP, every time, and to have proper measures in place to help them exit, rather than what seems like the "default" position of passivity - that the binding is going to continue. Don't judge any individuals or force them to do anything, but I'm not convinced that the message is getting across clearly enough from medical professionals that the physically safest path is to stop binding, even if people choose not to take it.
For the record, I don't think the commercial binders necessarily keep females-who-identify-as-men-or-nonbinary from having fever negative outcomes, either, if this study was correct:
"Chest binding involves the compression of chest tissue for masculine gender expression among people assigned a female sex at birth, particularly transgender and gender non-conforming individuals. There are no peer-reviewed studies that directly assess the health impacts of chest binding, yet transgender community resources commonly discuss symptoms such as pain and scarring. A cross-sectional 32-item survey was administered online to an anonymous, non-random sample of adults who were assigned a female sex at birth and had had experience of binding (n = 1800). Multivariate regression models were used to identify practices associated with self-reported health outcomes. Of participants, 51.5% reported daily binding. Over 97% reported at least one of 28 negative outcomes attributed to binding. Frequency (days/week) was consistently associated with negative outcomes (22/28 outcomes). Compression methods associated with symptoms were commercial binders (20/28), elastic bandages (14/28) and duct tape or plastic wrap (13/28). Larger chest size was primarily associated with dermatological problems. Binding is a frequent activity for many transmasculine individuals, despite associated symptoms."
www.tandfonline.com/doi/abs/10.1080/13691058.2016.1191675?journalCode=tchs20