Here are JainKnowledge pages that discuss the Ikshvaku (Solar) dynasty in relation to Jain tradition:

• Is Rishab Dev and Sri Ram are of same dynasty — discusses the Ikshvaku lineage and Rishabhanatha as part of it. You can read more here

• Ranakpur Jain Temple — mentions Rishabhanatha as the first Tirthankara and links to the Ikshvaku dynasty context. You can read more here