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Some old herbals list bracket fungi as useful in treating certain diseases; however, more modern sources list them as poisonous. Be that as it may, they are certainly not edible. But if you mean, can you be poisoned by handling or brushing agains one, I wouldn't think so. Gloves are recommended if you're planning to mess with one, however. Here's some more information: https://www.gardeningknowhow.com/ornamental/fungus-lichen/tree-bracket-fungus.htm

Bracket Fungus or shelf fungus does prefer to attach to host trees in a damp environment.

Here is a link about Bracket Fungus.

https://www.gardeningknowhow.com/ornamental/fungus-lichen/tree-bracket-fungus.htm

There should not be any issues touching or handling Shelf Fungus.

Well, this is interesting, and unfortunate! While the species Leatiporus is regarded as edible... It will not be from this wood. It is not safe to consume fungi growing from this wood source.

At this point, seeing a mature fruiting body, the wood will not be able to be saved. The mycelium is well within the wood, causing a brown rot. This will cause the wood to crumble, eventually.

You will be looking at replacing this wood, unfortunately.

Should you decide to take a culture or spores and make an attempt at growing them, you can switch the culture to a different wood source, such as Oak fuel pellets. They will, then, be safe for consumption. Just not on the current wood source. That is no good. Otherwise, when growing in the proper substrate, these make a wonderful chicken substitute. Please do not eat them from Eucalyptus wood, though.