Your search for "hpe sfp28" revealed the following:
Dell SFP28-25G-LR 0YR96 25GB BASE-LR 1310nm SMF LC SFP28 Transceiver
SKU: NSB-5936
Condition: Seller refurbished
Shipping: Overnight Options
Warranty: 365 days
NEW HPE AJ718A 8GB Fibre Channel 850nm 850nm MMF 150m DOM SFP+ Transceiver
SKU: NSN-8724
Condition: New
Shipping: Overnight Options
Warranty: 365 days
Dell SFP28 25GbE SR-85C FTLF8536P4BNL-E5 25GB BASE-SR 850nm SFP28 Transceiver
SKU: NSB-2034
Condition: Seller refurbished
Shipping: Overnight Options
Warranty: 365 days
NEW Dell S5296F-ON EMC S 96x 25GB SFP28 8x 100GB QSFP28 F-B Air OS10 Switch
SKU: NSN-1911
Condition: New
Shipping: Overnight Options
Warranty: 365 days
Dell 470-ACEU 54M38 3m 25GB SFP28 Passive Direct Attach Cable
SKU: NSB-9237
Condition: Seller refurbished
Shipping: Overnight Options
Warranty: 365 days
NEW Juniper EX4400-EM-4Y EX4400 Series 4x 25GB SFP28 Switch Module
SKU: NSN-5900
Condition: New
Shipping: Overnight Options
Warranty: 365 days
SuperMicro AOC-S25G-b2S 2x 25GB SFP28 PCIe 3.0 x8 Server Add On Card
SKU: NSB-7244
Condition: Seller refurbished
Shipping: Overnight Options
Warranty: 365 days
Fiberstore QSFP28-4X25G-DAC 2m 100GB QSFP28 to 4x 25GB SFP28 DA Breakout Cable
SKU: NSB-1323
Condition: Seller refurbished
Shipping: Overnight Options
Warranty: 365 days
NEW HPE JL824A FlexNetwork 5140 EI Series 48x 1GB PoE+ RJ45 4x 10GB SFP+ Switch
SKU: NSN-0419
Condition: New
Shipping: Overnight Options
Warranty: 365 days
Dell S5248F-ON 48x 25GB SFP28 2x 200GB QSFP28-DD 4x QSFP28 F-B No OS10 Switch
SKU: NSB-9762
Condition: Seller refurbished
Shipping: Overnight Options
Warranty: 365 days