No Axolotls Spawning Naturally

1. Current world is an old world (created in 1.16 MCPE Seed:353637052 Bedrock 1.16 Edition) updated to the latest version of minecraft 1.19.10
2. Researched into where an axolotl will spawn in lush caves with nearby clay blocks
3. Explored a range of lush caves containing a variety of pools of water for several hours
4. No axolotls OR tropical fish spawning in these pools at all, only glowing squid in nearby pools
5. made a creative experimental world copy of my old world and stood within a few lush caves and tried to /tp @e [type=minecraft:axolotl] @p and /tp @e [type= axolotl] @p to teleport the nearest axolotl to me incase i missed one and it displayed "No targets matched selector"