I AM Sayings OT background

 Ian Paul helpfully draws attention to this: (https://www.psephizo.com/biblical-studies/jesus-the-good-shepherd-leads-his-sheep-in-john-10/)

 Felix Just notes how all these images are rooted in the OT, and primarily refer to God’s relationship with Israel:

• Bread of Life / Bread from Heaven – see Exod 16; Num 11:6-9; Ps 78:24; Isa 55:1-3; Neh 9:15; 2 Mac 2:5-8
• Light of the World – Exod 13:21-22; Isa 42:6-7; Ps 97:4
• Good Shepherd – Ezek 34:1-41; Gen 48:15; 49:24; Ps 23:1-4; 80:1; 100:3-4; Micah 7:14
• Resurrection / Life – Dan 12:2; Ps 56:13; 2 Mac 7:1-38
• Way – Exod 33:13; Ps 25:4; 27:11; 86:11; 119:59; Isa 40:3; 62:10
• Truth – 1 Kings 17:4; Ps 25:5; 43:3; 86:11; 119:160; Isa 45:19
• Vine / Vineyard – Isa 5:1-7; Ps 80:9-17; Jer 2:21; Ezek 17:5-10

As Paul comments: "So Jesus’ claims here contribute to the high Christology of this gospel; what God was to Israel, Jesus now is to those who follow him."