Just because Hagoromo can use the Rinnegan in such way, doesn't mean Kaguya can do it with her Rinne Sharingan, unless we have a feat or statement of her doing so. If we allowed Kaguya to have all Jutsus, dojutsus and so on via "statement", then, the same should apply to Yhwach in which case he would have access to 26 more powers and Yamamoto's Bankai via "statement". Which would end in a stomp in Yhwach's favor. She also ended up defeated, and sealed by her sons. I'll put her a bit above him, Yes.
She never swap dimensions "directly" to her Acid World IIRC. She use a portal to bring the Acid to her and her opponents, meaning that either her regeneration isn't going to bring her back if she gets hit by it to or mostly PIS to not One-Shot the main characters. Anyway, Yhwach can dimension jump via Shadows, Open Portals, Fly, Stand on Air, and even use his own blood as a Dome Barrier that consumes anything on contact to expand the barrier, however it hasn't show to absorb acid.
Yhwach can absorb Reishi, Reiryoku, Reiatsu, powers, souls, physical & energy deitys. (Beings made of energy like the Tail Beasts)
Yhwach has matter manipulation as he can reshape at will structures made of spiritual atoms.