Your search for "hpe sfp28" revealed the following:
Arista AOC-S-S-25G-10M 10m 25GB SFP28 Active Optical Cable
SKU: NSB-5325
Condition: Seller refurbished
Shipping: Overnight Options
Warranty: 365 days
Nvidia Mellanox MCP2M00-A001 1m 25GB SFP28 Direct Attach Copper Cable
SKU: NSB-0906
Condition: Seller refurbished
Shipping: Overnight Options
Warranty: 365 days
NEW Dell S5224F-ON-RA 24x 25GB SFP28 4x 100GB QSFP28 B-F Air No OS10 Switch
SKU: NSN-9949
Condition: New
Shipping: Overnight Options
Warranty: 365 days
NEW Dell S5148F-ON-RA 210-ANCL 48x 25GB SFP28 6x 100GB QSFP28 B-F No OS10 Switch
SKU: NSN-8132
Condition: New
Shipping: Overnight Options
Warranty: 365 days
NEW Dell S5212F-ON-RA 12x 25GB SFP28 3x 100GB QSFP28 B-B Air No OS10 Switch
SKU: NSN-9951
Condition: New
Shipping: Overnight Options
Warranty: 365 days
Extreme VSP7400-48Y-8C-AC-F 48x 25GB SFP28 8x 100GB QSFP28 F-B Airflow Switch
SKU: NSH-8528
Condition: Seller refurbished
Shipping: Overnight Options
Warranty: 365 days
NEW Juniper QFX5200-48Y-AFI 48x 25GB SFP28 6x 100GB QSFP28 B-F Airflow Switch
SKU: NSN-3632
Condition: New
Shipping: Overnight Options
Warranty: 365 days
NEW Dell S5212F-ON EMC S 12x 25GB SFP28 3x 100GB QSFP28 F-B Air OS10 Switch
SKU: NSN-4145
Condition: New
Shipping: Overnight Options
Warranty: 365 days
Juniper EX4100-24P 24x 1GB PoE+ RJ-45 4x 10GB SFP+ 4x 25GB SFP28 F-B Air Switch
SKU: NSB-1616
Condition: Seller refurbished
Shipping: Overnight Options
Warranty: 365 days
Cisco Meraki C9300-NM-2Y-M Catalyst 9300-M 2x 25GB SFP28 Switch Module
SKU: NSB-4092
Condition: Seller refurbished
Shipping: Overnight Options
Warranty: 365 days