Difficult to see from this pic and angle. If it was me: I would get my mask on, spray the area with my spray bottle of water till it’s getting drippy and then use wet wet’n’dry to flatten it off with a vacuum in my other hand very close to catch as much crap as possible. Then put a rendering compound over it and fair it off so everything is covered but doesn’t look too lumpy. Then I would leave and wait a day. Come back in with mask on, damp cloth and bucket of soapy water, wipe everything down from top to bottom, then mop the floor and let it all dry then vacuum everything. After that use my finger to find if there’s any residue, human finger can feel stuff at tiny micron levels. If it feels grainy I would vacuum again and then wipe down with acetone maybe? Obviously goes without saying but just in case; I would take anything with complicated surfaces/ a high human interaction object out before starting and if there’s anything that is going to be an issue to clean that can’t be removed I would cover it in a dust sheet and tape it down, then dispose of the dust sheet once done. I don’t recommend this cowboy approach to life, if you think it might be asbestos best to get it tested, but I am fairly old and my job means I am always exposed to all kinds of terrible particles and chemicals so I tend to be quite lessezfaire about stuff, I mask up with appropriate filters and get stuck in because While I DO enjoy life immensely I have no plans to get out of it alive anyway.