Solutions like sharding, off-chain transactions to increase Bitcoin's transaction capacity. Bitcoin's blockchain processes approximately 7 transactions per second. Scalability solutions aim to increase this capacity.
Having higher TPS (Transactions Per Second) is not main reason for careful people who are serious with safety of their fund, when choosing a blockchain for their fund movement.
Security of a blockchain and transactions made on it, is more important for your fund safety and no blockchain is better than Bitcoin blockchain.
What is the Blockchain Trilemma?Sidechain Observer - Bitcoin L2 Projects & current state of development