in java 1.9 the apple went through changes which is Enchanted golden apples now give Regeneration II (down from V) and Absorption IV (up from I), in addition to the unchanged Resistance and Fire Resistance effects. The duration of the Regeneration effect has now also been decreased to 20 seconds. (from wiki) but in bedrock the regeneration change was never included so you get regen v instead of 2 and also 30 seconds instead of 20 making you invincible with prot 4 netherite for 30 seconds even against a warden and you can get them in quantities in ancient cities