People ask "how do I make x on mobile" pretty consistently. There are no official tools or tutorials for doing so, and do not expect us to make any. However, you are free to discuss the subject here. Maybe we can compile all useful info about mobile modding here.
To my knowledge, it's possible to make Lua scripts, audio, and graphics on mobile, and you can use mobile apps to assemble them into a PK3, but there are no mapping tools for mobile that work with SRB2.
Inb4 "but Exagear/similar app exists" -- I'm pretty sure that has spotty compatibility, plus I'm fairly confident the vast majority of people whose only option is a mobile device will not have one powerful enough to run SLADE or Zone Builder at a reasonable speed, if at all.
To my knowledge, it's possible to make Lua scripts, audio, and graphics on mobile, and you can use mobile apps to assemble them into a PK3, but there are no mapping tools for mobile that work with SRB2.
Inb4 "but Exagear/similar app exists" -- I'm pretty sure that has spotty compatibility, plus I'm fairly confident the vast majority of people whose only option is a mobile device will not have one powerful enough to run SLADE or Zone Builder at a reasonable speed, if at all.