I was told only ETH and BTC were allowed, not sure about the regulations behind this are.
What cyptocurrencies are allowed to be listed on exchange apps?
The guidelines are here: https://developer.apple.com/app-store/review/guidelines/#goods-and-services
Note:
3.1.5 (b) (iii) Exchanges: Apps may facilitate transactions or transmissions of cryptocurrency on an approved exchange, provided they are offered by the exchange itself.
2022/10/24 update
3.1.5 Cryptocurrencies: (iii) Exchanges: Apps may facilitate transactions or transmissions of cryptocurrency on an approved exchange, provided they are offered only in countries or regions where the app has appropriate licensing and permissions to provide a cryptocurrency exchange.