When copy and pasting from the safari browser or research browser they are copied with they formatting.(hyperlinks, font size, bold…)
Therefore we can’t maintain a clean mind map. These nodes stand out from other nodes which are grabbed from pdf. If they follow the default font settings mind maps would be very clean and not be appeared like a mess.
For the mac version there may have many extensions/softwares. For the iPad version there is no such softwares. Therefore could you please consider about making an extension or built in feature for iPad.