Bedrock Edition uses data values to store the potion effect used by a potion or Tipped Arrow. To give a potion of tipped arrow with the specified effect, you use the command:
/give <player> potion <data value>
where the data value is looked up from this table:
Tipped arrows use a similar syntax:
/give <player> arrow <data value>
(note: it's just arrow, not tipped_arrow, unlike in Java Edition, and the data values are off by one)
